21311302112 has 48 divisors (see below), whose sum is σ = 42618380112. Its totient is φ = 10487854080.

The previous prime is 21311302099. The next prime is 21311302127. The reversal of 21311302112 is 21120311312.

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, 3111812 + ... + 3118652.

It is an arithmetic number, because the mean of its divisors is an integer number (887882919).

Almost surely, 2^21311302112 is an apocalyptic number.

It is an amenable number.

21311302112 is a deficient number, since it is larger than the sum of its proper divisors (21307078000).

21311302112 is a wasteful number, since it uses less digits than its factorization.

21311302112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8371 (or 8363 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21311302112 its reverse (21120311312), we get a palindrome (42431613424).

The spelling of 21311302112 in words is "twenty-one billion, three hundred eleven million, three hundred two thousand, one hundred twelve".