21133130202131 has 4 divisors (see below), whose sum is σ = 21285167110200. Its totient is φ = 20981093294064.

The previous prime is 21133130202113. The next prime is 21133130202161. The reversal of 21133130202131 is 13120203133112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21133130202131 - 2²² = 21133126007827 is a prime.

It is a super-2 number, since 2×21133130202131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21133130202097 and 21133130202106.

It is not an unprimeable number, because it can be changed into a prime (21133130202161) 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, 76018453826 + ... + 76018454103.

It is an arithmetic number, because the mean of its divisors is an integer number (5321291777550).

Almost surely, 2^{21133130202131} is an apocalyptic number.

21133130202131 is a deficient number, since it is larger than the sum of its proper divisors (152036908069).

21133130202131 is a wasteful number, since it uses less digits than its factorization.

21133130202131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152036908068.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21133130202131 its reverse (13120203133112), we get a palindrome (34253333335243).

The spelling of 21133130202131 in words is "twenty-one trillion, one hundred thirty-three billion, one hundred thirty million, two hundred two thousand, one hundred thirty-one".