23221021212 has 36 divisors (see below), whose sum is σ = 58706793600. Its totient is φ = 7739125632.

The previous prime is 23221021189. The next prime is 23221021267. The reversal of 23221021212 is 21212012232.

23221021212 is a `hidden beast` number, since 232 + 210 + 212 + 12 = 666.

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

It is a super-2 number, since 2×23221021212² (a number of 22 digits) contains 22 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, 198789 + ... + 293187.

Almost surely, 2^23221021212 is an apocalyptic number.

It is an amenable number.

23221021212 is an abundant number, since it is smaller than the sum of its proper divisors (35485772388).

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

23221021212 is a wasteful number, since it uses less digits than its factorization.

23221021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101242 (or 101237 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 23221021212 its reverse (21212012232), we get a palindrome (44433033444).

The spelling of 23221021212 in words is "twenty-three billion, two hundred twenty-one million, twenty-one thousand, two hundred twelve".