21202001131 has 2 divisors, whose sum is σ = 21202001132. Its totient is φ = 21202001130.

The previous prime is 21202001063. The next prime is 21202001167. The reversal of 21202001131 is 13110020212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202001131 - 2⁷ = 21202001003 is a prime.

It is a super-2 number, since 2×21202001131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21202008131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601000565 + 10601000566.

It is an arithmetic number, because the mean of its divisors is an integer number (10601000566).

Almost surely, 2^21202001131 is an apocalyptic number.

21202001131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202001131 is an equidigital number, since it uses as much as digits as its factorization.

21202001131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21202001131 its reverse (13110020212), we get a palindrome (34312021343).

The spelling of 21202001131 in words is "twenty-one billion, two hundred two million, one thousand, one hundred thirty-one".