23221121212 has 6 divisors (see below), whose sum is σ = 40636962128. Its totient is φ = 11610560604.

The previous prime is 23221121173. The next prime is 23221121213. The reversal of 23221121212 is 21212112232.

It is a self number, because there is not a number n which added to its sum of digits gives 23221121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221121213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2902640148 + ... + 2902640155.

Almost surely, 2^23221121212 is an apocalyptic number.

It is an amenable number.

23221121212 is a deficient number, since it is larger than the sum of its proper divisors (17415840916).

23221121212 is a wasteful number, since it uses less digits than its factorization.

23221121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5805280307 (or 5805280305 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

Adding to 23221121212 its reverse (21212112232), we get a palindrome (44433233444).

The spelling of 23221121212 in words is "twenty-three billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".