21101599031 has 8 divisors (see below), whose sum is σ = 21132661200. Its totient is φ = 21070559808.

The previous prime is 21101599007. The next prime is 21101599037. The reversal of 21101599031 is 13099510112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101599031 is a prime.

It is a super-2 number, since 2×21101599031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101599037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2678360 + ... + 2686226.

It is an arithmetic number, because the mean of its divisors is an integer number (2641582650).

Almost surely, 2^21101599031 is an apocalyptic number.

21101599031 is a deficient number, since it is larger than the sum of its proper divisors (31062169).

21101599031 is a wasteful number, since it uses less digits than its factorization.

21101599031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11473.

The product of its (nonzero) digits is 2430, while the sum is 32.

The spelling of 21101599031 in words is "twenty-one billion, one hundred one million, five hundred ninety-nine thousand, thirty-one".