223111120212 has 36 divisors (see below), whose sum is σ = 579217911636. Its totient is φ = 72360362880.

The previous prime is 223111120189. The next prime is 223111120259. The reversal of 223111120212 is 212021111322.

223111120212 is a `hidden beast` number, since 22 + 311 + 1 + 120 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 153253458576 + 69857661636 = 391476^2 + 264306^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×223111120212³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83749089 + ... + 83751752.

Almost surely, 2^223111120212 is an apocalyptic number.

It is an amenable number.

223111120212 is an abundant number, since it is smaller than the sum of its proper divisors (356106791424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223111120212 is a wasteful number, since it uses less digits than its factorization.

223111120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167500888 (or 167500883 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 223111120212 its reverse (212021111322), we get a palindrome (435132231534).

The spelling of 223111120212 in words is "two hundred twenty-three billion, one hundred eleven million, one hundred twenty thousand, two hundred twelve".