102195081427 has 2 divisors, whose sum is σ = 102195081428. Its totient is φ = 102195081426.

The previous prime is 102195081379. The next prime is 102195081431. The reversal of 102195081427 is 724180591201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102195081427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102195081427.

It is not a weakly prime, because it can be changed into another prime (102195081127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51097540713 + 51097540714.

It is an arithmetic number, because the mean of its divisors is an integer number (51097540714).

Almost surely, 2^102195081427 is an apocalyptic number.

102195081427 is a deficient number, since it is larger than the sum of its proper divisors (1).

102195081427 is an equidigital number, since it uses as much as digits as its factorization.

102195081427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 102195081427 in words is "one hundred two billion, one hundred ninety-five million, eighty-one thousand, four hundred twenty-seven".