21331200131 has 4 divisors (see below), whose sum is σ = 21331497264. Its totient is φ = 21330903000.

The previous prime is 21331200119. The next prime is 21331200157. The reversal of 21331200131 is 13100213312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21331200131 - 2¹⁴ = 21331183747 is a prime.

It is a super-2 number, since 2×21331200131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21331200031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33461 + ... + 209241.

It is an arithmetic number, because the mean of its divisors is an integer number (5332874316).

Almost surely, 2^21331200131 is an apocalyptic number.

21331200131 is a deficient number, since it is larger than the sum of its proper divisors (297133).

21331200131 is a wasteful number, since it uses less digits than its factorization.

21331200131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297132.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21331200131 its reverse (13100213312), we get a palindrome (34431413443).

The spelling of 21331200131 in words is "twenty-one billion, three hundred thirty-one million, two hundred thousand, one hundred thirty-one".