102127319861 has 4 divisors (see below), whose sum is σ = 116716936992. Its totient is φ = 87537702732.

The previous prime is 102127319809. The next prime is 102127319873. The reversal of 102127319861 is 168913721201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168913721201 = 503 ⋅335812567.

It is a cyclic number.

It is not a de Polignac number, because 102127319861 - 2⁶ = 102127319797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102127319891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7294808555 + ... + 7294808568.

It is an arithmetic number, because the mean of its divisors is an integer number (29179234248).

Almost surely, 2^102127319861 is an apocalyptic number.

It is an amenable number.

102127319861 is a deficient number, since it is larger than the sum of its proper divisors (14589617131).

102127319861 is an equidigital number, since it uses as much as digits as its factorization.

102127319861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14589617130.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 102127319861 in words is "one hundred two billion, one hundred twenty-seven million, three hundred nineteen thousand, eight hundred sixty-one".