20010122131 has 2 divisors, whose sum is σ = 20010122132. Its totient is φ = 20010122130.

The previous prime is 20010122117. The next prime is 20010122179. The reversal of 20010122131 is 13122101002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010122131 is a prime.

It is a super-2 number, since 2×20010122131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20010122101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005061065 + 10005061066.

It is an arithmetic number, because the mean of its divisors is an integer number (10005061066).

Almost surely, 2^20010122131 is an apocalyptic number.

20010122131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010122131 is an equidigital number, since it uses as much as digits as its factorization.

20010122131 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20010122131 its reverse (13122101002), we get a palindrome (33132223133).

The spelling of 20010122131 in words is "twenty billion, ten million, one hundred twenty-two thousand, one hundred thirty-one".