223121211204 has 96 divisors (see below), whose sum is σ = 531569511424. Its totient is φ = 72825661440.

The previous prime is 223121211197. The next prime is 223121211223. The reversal of 223121211204 is 402112121322.

It is a happy number.

It is a super-3 number, since 3×223121211204³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82240152 + ... + 82242864.

Almost surely, 2^223121211204 is an apocalyptic number.

It is an amenable number.

223121211204 is an abundant number, since it is smaller than the sum of its proper divisors (308448300220).

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

223121211204 is a wasteful number, since it uses less digits than its factorization.

223121211204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437 (or 3435 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 223121211204 its reverse (402112121322), we get a palindrome (625233332526).

The spelling of 223121211204 in words is "two hundred twenty-three billion, one hundred twenty-one million, two hundred eleven thousand, two hundred four".