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167211221221 = 1161249197051
BaseRepresentation
bin1001101110111010010…
…0001100000011100101
3120222121020102010211101
42123232210030003211
510214422033034341
6204452112440101
715036435633532
oct2335644140345
9528536363741
10167211221221
1164a06414420
12284a6849031
13129ca258525
148143533d89
154539aca831
hex26ee90c0e5

167211221221 has 8 divisors (see below), whose sum is σ = 185402606688. Its totient is φ = 149518230000.

The previous prime is 167211221201. The next prime is 167211221251. The reversal of 167211221221 is 122122112761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 167211221221 - 217 = 167211090149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 167211221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167211221201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124597855 + ... + 124599196.

It is an arithmetic number, because the mean of its divisors is an integer number (23175325836).

Almost surely, 2167211221221 is an apocalyptic number.

167211221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

167211221221 is a deficient number, since it is larger than the sum of its proper divisors (18191385467).

167211221221 is a wasteful number, since it uses less digits than its factorization.

167211221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249197123.

The product of its digits is 1344, while the sum is 28.

Adding to 167211221221 its reverse (122122112761), we get a palindrome (289333333982).

The spelling of 167211221221 in words is "one hundred sixty-seven billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".

Divisors: 1 11 61 671 249197051 2741167561 15201020111 167211221221