21140202412 has 12 divisors (see below), whose sum is σ = 42280404880. Its totient is φ = 9060086736.

The previous prime is 21140202373. The next prime is 21140202431. The reversal of 21140202412 is 21420204112.

21140202412 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21140202412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377503587 + ... + 377503642.

Almost surely, 2^21140202412 is an apocalyptic number.

It is an amenable number.

21140202412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21140202412 is a wasteful number, since it uses less digits than its factorization.

21140202412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755007240 (or 755007238 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21140202412 its reverse (21420204112), we get a palindrome (42560406524).

The spelling of 21140202412 in words is "twenty-one billion, one hundred forty million, two hundred two thousand, four hundred twelve".