21010431412 has 72 divisors (see below), whose sum is σ = 39392707200. Its totient is φ = 9798122880.

The previous prime is 21010431383. The next prime is 21010431433. The reversal of 21010431412 is 21413401012.

It is a self number, because there is not a number n which added to its sum of digits gives 21010431412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13057264 + ... + 13058872.

Almost surely, 2^21010431412 is an apocalyptic number.

It is an amenable number.

21010431412 is a deficient number, since it is larger than the sum of its proper divisors (18382275788).

21010431412 is a wasteful number, since it uses less digits than its factorization.

21010431412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1764 counting only the distinct ones).

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

Adding to 21010431412 its reverse (21413401012), we get a palindrome (42423832424).

The spelling of 21010431412 in words is "twenty-one billion, ten million, four hundred thirty-one thousand, four hundred twelve".