21002210412 has 24 divisors (see below), whose sum is σ = 49835755200. Its totient is φ = 6882080016.

The previous prime is 21002210393. The next prime is 21002210549. The reversal of 21002210412 is 21401220012.

It is a junction number, because it is equal to n+sod(n) for n = 21002210391 and 21002210400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14831362 + ... + 14832777.

It is an arithmetic number, because the mean of its divisors is an integer number (2076489800).

Almost surely, 2^21002210412 is an apocalyptic number.

It is an amenable number.

21002210412 is an abundant number, since it is smaller than the sum of its proper divisors (28833544788).

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

21002210412 is a wasteful number, since it uses less digits than its factorization.

21002210412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29664205 (or 29664203 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21002210412 its reverse (21401220012), we get a palindrome (42403430424).

The spelling of 21002210412 in words is "twenty-one billion, two million, two hundred ten thousand, four hundred twelve".