102212099979 has 24 divisors (see below), whose sum is σ = 150043145616. Its totient is φ = 61845537600.

The previous prime is 102212099879. The next prime is 102212099987. The reversal of 102212099979 is 979990212201.

It is not a de Polignac number, because 102212099979 - 2⁷ = 102212099851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102212099279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7152 + ... + 452189.

It is an arithmetic number, because the mean of its divisors is an integer number (6251797734).

Almost surely, 2^102212099979 is an apocalyptic number.

102212099979 is a deficient number, since it is larger than the sum of its proper divisors (47831045637).

102212099979 is a wasteful number, since it uses less digits than its factorization.

102212099979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459979 (or 459968 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 51.

The spelling of 102212099979 in words is "one hundred two billion, two hundred twelve million, ninety-nine thousand, nine hundred seventy-nine".