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222211121 = 1179255709
BaseRepresentation
bin11010011111010…
…10110000110001
3120111010111100112
431033222300301
5423341223441
634014431105
75335522556
oct1517526061
9514114315
10222211121
11104483560
1262502495
1337062c92
1421724a2d
15147954eb
hexd3eac31

222211121 has 8 divisors (see below), whose sum is σ = 245481600. Its totient is φ = 199452240.

The previous prime is 222211117. The next prime is 222211127. The reversal of 222211121 is 121112222.

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 222211121 - 22 = 222211117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222211096 and 222211105.

It is not an unprimeable number, because it can be changed into a prime (222211127) 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, 126986 + ... + 128723.

It is an arithmetic number, because the mean of its divisors is an integer number (30685200).

Almost surely, 2222211121 is an apocalyptic number.

It is an amenable number.

222211121 is a deficient number, since it is larger than the sum of its proper divisors (23270479).

222211121 is a wasteful number, since it uses less digits than its factorization.

222211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255799.

The product of its digits is 32, while the sum is 14.

The square root of 222211121 is about 14906.7474990355. The cubic root of 222211121 is about 605.6967779797.

Adding to 222211121 its reverse (121112222), we get a palindrome (343323343).

The spelling of 222211121 in words is "two hundred twenty-two million, two hundred eleven thousand, one hundred twenty-one".

Divisors: 1 11 79 869 255709 2812799 20201011 222211121