21200122133131 has 4 divisors (see below), whose sum is σ = 21405948561712. Its totient is φ = 20994295704552.

The previous prime is 21200122133119. The next prime is 21200122133137. The reversal of 21200122133131 is 13133122100212.

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 21200122133131 - 2¹⁵ = 21200122100363 is a prime.

It is a super-2 number, since 2×21200122133131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200122133137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102913214136 + ... + 102913214341.

It is an arithmetic number, because the mean of its divisors is an integer number (5351487140428).

Almost surely, 2^{21200122133131} is an apocalyptic number.

21200122133131 is a deficient number, since it is larger than the sum of its proper divisors (205826428581).

21200122133131 is a wasteful number, since it uses less digits than its factorization.

21200122133131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205826428580.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21200122133131 its reverse (13133122100212), we get a palindrome (34333244233343).

The spelling of 21200122133131 in words is "twenty-one trillion, two hundred billion, one hundred twenty-two million, one hundred thirty-three thousand, one hundred thirty-one".