21331001312 has 24 divisors (see below), whose sum is σ = 42004354392. Its totient is φ = 10663228800.

The previous prime is 21331001287. The next prime is 21331001353. The reversal of 21331001312 is 21310013312.

It is a congruent number.

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, 86987 + ... + 224117.

It is an arithmetic number, because the mean of its divisors is an integer number (1750181433).

Almost surely, 2^21331001312 is an apocalyptic number.

It is an amenable number.

21331001312 is a deficient number, since it is larger than the sum of its proper divisors (20673353080).

21331001312 is a wasteful number, since it uses less digits than its factorization.

21331001312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142002 (or 141994 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21331001312 its reverse (21310013312), we get a palindrome (42641014624).

The spelling of 21331001312 in words is "twenty-one billion, three hundred thirty-one million, one thousand, three hundred twelve".