21164133411 has 32 divisors (see below), whose sum is σ = 32385331200. Its totient is φ = 13645998720.

The previous prime is 21164133409. The next prime is 21164133413. The reversal of 21164133411 is 11433146112.

21164133411 is a `hidden beast` number, since 2 + 1 + 1 + 641 + 3 + 3 + 4 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (21164133409) and next prime (21164133413).

It is not a de Polignac number, because 21164133411 - 2¹ = 21164133409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21164133413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1565995 + ... + 1579451.

It is an arithmetic number, because the mean of its divisors is an integer number (1012041600).

Almost surely, 2^21164133411 is an apocalyptic number.

21164133411 is a deficient number, since it is larger than the sum of its proper divisors (11221197789).

21164133411 is a wasteful number, since it uses less digits than its factorization.

21164133411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15376 (or 15370 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 21164133411 its reverse (11433146112), we get a palindrome (32597279523).

The spelling of 21164133411 in words is "twenty-one billion, one hundred sixty-four million, one hundred thirty-three thousand, four hundred eleven".