21012031302 has 16 divisors (see below), whose sum is σ = 42074765040. Its totient is φ = 6995560032.

The previous prime is 21012031289. The next prime is 21012031319. The reversal of 21012031302 is 20313021012.

It is a congruent number.

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, 2107213 + ... + 2117160.

It is an arithmetic number, because the mean of its divisors is an integer number (2629672815).

Almost surely, 2^21012031302 is an apocalyptic number.

21012031302 is an abundant number, since it is smaller than the sum of its proper divisors (21062733738).

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

21012031302 is a wasteful number, since it uses less digits than its factorization.

21012031302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4225207.

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

Adding to 21012031302 its reverse (20313021012), we get a palindrome (41325052314).

The spelling of 21012031302 in words is "twenty-one billion, twelve million, thirty-one thousand, three hundred two".