21202322131 has 2 divisors, whose sum is σ = 21202322132. Its totient is φ = 21202322130.

The previous prime is 21202322117. The next prime is 21202322159. The reversal of 21202322131 is 13122320212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202322131 - 2²¹ = 21200224979 is a prime.

It is a super-2 number, since 2×21202322131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21202322099 and 21202322108.

It is not a weakly prime, because it can be changed into another prime (21202322731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601161065 + 10601161066.

It is an arithmetic number, because the mean of its divisors is an integer number (10601161066).

Almost surely, 2^21202322131 is an apocalyptic number.

21202322131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202322131 is an equidigital number, since it uses as much as digits as its factorization.

21202322131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21202322131 its reverse (13122320212), we get a palindrome (34324642343).

The spelling of 21202322131 in words is "twenty-one billion, two hundred two million, three hundred twenty-two thousand, one hundred thirty-one".