102612512491 has 2 divisors, whose sum is σ = 102612512492. Its totient is φ = 102612512490.

The previous prime is 102612512467. The next prime is 102612512549. The reversal of 102612512491 is 194215216201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102612512491 - 2¹¹ = 102612510443 is a prime.

It is not a weakly prime, because it can be changed into another prime (102612512461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51306256245 + 51306256246.

It is an arithmetic number, because the mean of its divisors is an integer number (51306256246).

Almost surely, 2^102612512491 is an apocalyptic number.

102612512491 is a deficient number, since it is larger than the sum of its proper divisors (1).

102612512491 is an equidigital number, since it uses as much as digits as its factorization.

102612512491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

Adding to 102612512491 its reverse (194215216201), we get a palindrome (296827728692).

The spelling of 102612512491 in words is "one hundred two billion, six hundred twelve million, five hundred twelve thousand, four hundred ninety-one".