21320122112 has 18 divisors (see below), whose sum is σ = 42556963008. Its totient is φ = 10660060928.

The previous prime is 21320122097. The next prime is 21320122123. The reversal of 21320122112 is 21122102312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41640608 + ... + 41641119.

Almost surely, 2^21320122112 is an apocalyptic number.

It is an amenable number.

21320122112 is a deficient number, since it is larger than the sum of its proper divisors (21236840896).

21320122112 is an frugal number, since it uses more digits than its factorization.

21320122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83281743 (or 83281729 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21320122112 its reverse (21122102312), we get a palindrome (42442224424).

The spelling of 21320122112 in words is "twenty-one billion, three hundred twenty million, one hundred twenty-two thousand, one hundred twelve".