102010121211157 has 2 divisors, whose sum is σ = 102010121211158. Its totient is φ = 102010121211156.

The previous prime is 102010121211149. The next prime is 102010121211253. The reversal of 102010121211157 is 751112121010201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97076209631076 + 4933911580081 = 9852726^2 + 2221241^2 .

It is a cyclic number.

It is not a de Polignac number, because 102010121211157 - 2³ = 102010121211149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102010121211127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51005060605578 + 51005060605579.

It is an arithmetic number, because the mean of its divisors is an integer number (51005060605579).

Almost surely, 2^{102010121211157} is an apocalyptic number.

It is an amenable number.

102010121211157 is a deficient number, since it is larger than the sum of its proper divisors (1).

102010121211157 is an equidigital number, since it uses as much as digits as its factorization.

102010121211157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 25.

Adding to 102010121211157 its reverse (751112121010201), we get a palindrome (853122242221358).

The spelling of 102010121211157 in words is "one hundred two trillion, ten billion, one hundred twenty-one million, two hundred eleven thousand, one hundred fifty-seven".