21310032112 has 20 divisors (see below), whose sum is σ = 41389149040. Its totient is φ = 10628961408.

The previous prime is 21310032109. The next prime is 21310032113. The reversal of 21310032112 is 21123001312.

It is a super-2 number, since 2×21310032112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310032113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1621668 + ... + 1634755.

It is an arithmetic number, because the mean of its divisors is an integer number (2069457452).

Almost surely, 2^21310032112 is an apocalyptic number.

It is an amenable number.

21310032112 is a deficient number, since it is larger than the sum of its proper divisors (20079116928).

21310032112 is a wasteful number, since it uses less digits than its factorization.

21310032112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256840 (or 3256834 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21310032112 its reverse (21123001312), we get a palindrome (42433033424).

The spelling of 21310032112 in words is "twenty-one billion, three hundred ten million, thirty-two thousand, one hundred twelve".