102001002157 has 2 divisors, whose sum is σ = 102001002158. Its totient is φ = 102001002156.

The previous prime is 102001002107. The next prime is 102001002211. The reversal of 102001002157 is 751200100201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80095226121 + 21905776036 = 283011^2 + 148006^2 .

It is a cyclic number.

It is not a de Polignac number, because 102001002157 - 2¹¹ = 102001000109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102001002107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000501078 + 51000501079.

It is an arithmetic number, because the mean of its divisors is an integer number (51000501079).

Almost surely, 2^102001002157 is an apocalyptic number.

It is an amenable number.

102001002157 is a deficient number, since it is larger than the sum of its proper divisors (1).

102001002157 is an equidigital number, since it uses as much as digits as its factorization.

102001002157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 19.

Adding to 102001002157 its reverse (751200100201), we get a palindrome (853201102358).

The spelling of 102001002157 in words is "one hundred two billion, one million, two thousand, one hundred fifty-seven".