21013231003312 has 40 divisors (see below), whose sum is σ = 42534036732240. Its totient is φ = 10043879596800.

The previous prime is 21013231003273. The next prime is 21013231003333. The reversal of 21013231003312 is 21330013231012.

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, 224146878 + ... + 224240605.

It is an arithmetic number, because the mean of its divisors is an integer number (1063350918306).

Almost surely, 2^{21013231003312} is an apocalyptic number.

It is an amenable number.

21013231003312 is an abundant number, since it is smaller than the sum of its proper divisors (21520805728928).

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

21013231003312 is a wasteful number, since it uses less digits than its factorization.

21013231003312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448387621 (or 448387615 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21013231003312 its reverse (21330013231012), we get a palindrome (42343244234324).

The spelling of 21013231003312 in words is "twenty-one trillion, thirteen billion, two hundred thirty-one million, three thousand, three hundred twelve".