21130123002 has 16 divisors (see below), whose sum is σ = 42976522080. Its totient is φ = 6923994992.

The previous prime is 21130122961. The next prime is 21130123013. The reversal of 21130123002 is 20032103112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29844453 + ... + 29845160.

It is an arithmetic number, because the mean of its divisors is an integer number (2686032630).

Almost surely, 2^21130123002 is an apocalyptic number.

21130123002 is an abundant number, since it is smaller than the sum of its proper divisors (21846399078).

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

21130123002 is a wasteful number, since it uses less digits than its factorization.

21130123002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59689677.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21130123002 its reverse (20032103112), we get a palindrome (41162226114).

The spelling of 21130123002 in words is "twenty-one billion, one hundred thirty million, one hundred twenty-three thousand, two".