102020011111957 has 2 divisors, whose sum is σ = 102020011111958. Its totient is φ = 102020011111956.

The previous prime is 102020011111901. The next prime is 102020011111981. The reversal of 102020011111957 is 759111110020201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89974349801361 + 12045661310596 = 9485481^2 + 3470686^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020011111957 - 2²³ = 102020002723349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020011111987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010005555978 + 51010005555979.

It is an arithmetic number, because the mean of its divisors is an integer number (51010005555979).

Almost surely, 2^{102020011111957} is an apocalyptic number.

It is an amenable number.

102020011111957 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020011111957 is an equidigital number, since it uses as much as digits as its factorization.

102020011111957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 31.

The spelling of 102020011111957 in words is "one hundred two trillion, twenty billion, eleven million, one hundred eleven thousand, nine hundred fifty-seven".