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BaseRepresentation
bin1010000011110011100100…
…10110010011000011001101
32220022202011112012100201022
411001321302112103003031
510344412302001202341
6115014125213323525
74442122000525022
oct501716226230315
986282145170638
1022121000022221
117059510901491
1225932461965a5
13c46002c79799
1456693aba9549
15285640a01e4b
hex141e725930cd

22121000022221 has 16 divisors (see below), whose sum is σ = 22386719531904. Its totient is φ = 21856269360384.

The previous prime is 22121000022193. The next prime is 22121000022263. The reversal of 22121000022221 is 12222000012122.

Adding to 22121000022221 its reverse (12222000012122), we get a palindrome (34343000034343).

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22121000022221 - 218 = 22120999760077 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 22121000022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121000027221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 913965506 + ... + 913989708.

It is an arithmetic number, because the mean of its divisors is an integer number (1399169970744).

Almost surely, 222121000022221 is an apocalyptic number.

It is an amenable number.

22121000022221 is a deficient number, since it is larger than the sum of its proper divisors (265719509683).

22121000022221 is a wasteful number, since it uses less digits than its factorization.

22121000022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44180.

The product of its (nonzero) digits is 128, while the sum is 17.

The spelling of 22121000022221 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-two thousand, two hundred twenty-one".