21131513201 has 16 divisors (see below), whose sum is σ = 22406630400. Its totient is φ = 19893417600.

The previous prime is 21131513197. The next prime is 21131513239. The reversal of 21131513201 is 10231513112.

It is a cyclic number.

It is not a de Polignac number, because 21131513201 - 2² = 21131513197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21131513261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2505770 + ... + 2514188.

It is an arithmetic number, because the mean of its divisors is an integer number (1400414400).

Almost surely, 2^21131513201 is an apocalyptic number.

It is an amenable number.

21131513201 is a deficient number, since it is larger than the sum of its proper divisors (1275117199).

21131513201 is a wasteful number, since it uses less digits than its factorization.

21131513201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600.

The product of its (nonzero) digits is 180, while the sum is 20.

The spelling of 21131513201 in words is "twenty-one billion, one hundred thirty-one million, five hundred thirteen thousand, two hundred one".