21202012112 has 20 divisors (see below), whose sum is σ = 41485623396. Its totient is φ = 10496044800.

The previous prime is 21202012037. The next prime is 21202012121. The reversal of 21202012112 is 21121020212.

It can be written as a sum of positive squares in 2 ways, for example, as 11122655296 + 10079356816 = 105464^2 + 100396^2 .

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, 6558413 + ... + 6561644.

Almost surely, 2^21202012112 is an apocalyptic number.

It is an amenable number.

21202012112 is a deficient number, since it is larger than the sum of its proper divisors (20283611284).

21202012112 is a wasteful number, since it uses less digits than its factorization.

21202012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13120166 (or 13120160 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21202012112 its reverse (21121020212), we get a palindrome (42323032324).

The spelling of 21202012112 in words is "twenty-one billion, two hundred two million, twelve thousand, one hundred twelve".