20202102131 has 2 divisors, whose sum is σ = 20202102132. Its totient is φ = 20202102130.

The previous prime is 20202102121. The next prime is 20202102163. The reversal of 20202102131 is 13120120202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20202102131 - 2³⁴ = 3022232947 is a prime.

It is a super-2 number, since 2×20202102131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20202102121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101051065 + 10101051066.

It is an arithmetic number, because the mean of its divisors is an integer number (10101051066).

Almost surely, 2^20202102131 is an apocalyptic number.

20202102131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202102131 is an equidigital number, since it uses as much as digits as its factorization.

20202102131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20202102131 its reverse (13120120202), we get a palindrome (33322222333).

The spelling of 20202102131 in words is "twenty billion, two hundred two million, one hundred two thousand, one hundred thirty-one".