21202008131 has 2 divisors, whose sum is σ = 21202008132. Its totient is φ = 21202008130.

The previous prime is 21202008101. The next prime is 21202008169. The reversal of 21202008131 is 13180020212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202008131 - 2¹⁸ = 21201745987 is a prime.

It is a super-2 number, since 2×21202008131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21202008101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601004065 + 10601004066.

It is an arithmetic number, because the mean of its divisors is an integer number (10601004066).

Almost surely, 2^21202008131 is an apocalyptic number.

21202008131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202008131 is an equidigital number, since it uses as much as digits as its factorization.

21202008131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21202008131 its reverse (13180020212), we get a palindrome (34382028343).

The spelling of 21202008131 in words is "twenty-one billion, two hundred two million, eight thousand, one hundred thirty-one".