21130664311 has 16 divisors (see below), whose sum is σ = 21694780800. Its totient is φ = 20576102560.

The previous prime is 21130664309. The next prime is 21130664333. The reversal of 21130664311 is 11346603112.

It is a cyclic number.

It is not a de Polignac number, because 21130664311 - 2¹ = 21130664309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21130664311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130664011) 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, 1613556 + ... + 1626598.

It is an arithmetic number, because the mean of its divisors is an integer number (1355923800).

Almost surely, 2^21130664311 is an apocalyptic number.

21130664311 is a deficient number, since it is larger than the sum of its proper divisors (564116489).

21130664311 is a wasteful number, since it uses less digits than its factorization.

21130664311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13406.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 21130664311 in words is "twenty-one billion, one hundred thirty million, six hundred sixty-four thousand, three hundred eleven".