21310113233212 has 6 divisors (see below), whose sum is σ = 37292698158128. Its totient is φ = 10655056616604.

The previous prime is 21310113233191. The next prime is 21310113233219. The reversal of 21310113233212 is 21233231101312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310113233219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2663764154148 + ... + 2663764154155.

Almost surely, 2^{21310113233212} is an apocalyptic number.

It is an amenable number.

21310113233212 is a deficient number, since it is larger than the sum of its proper divisors (15982584924916).

21310113233212 is a wasteful number, since it uses less digits than its factorization.

21310113233212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5327528308307 (or 5327528308305 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21310113233212 its reverse (21233231101312), we get a palindrome (42543344334524).

The spelling of 21310113233212 in words is "twenty-one trillion, three hundred ten billion, one hundred thirteen million, two hundred thirty-three thousand, two hundred twelve".