102021012099 has 6 divisors (see below), whose sum is σ = 147363684156. Its totient is φ = 68014008060.

The previous prime is 102021012077. The next prime is 102021012101. The reversal of 102021012099 is 990210120201.

It is not a de Polignac number, because 102021012099 - 2¹¹ = 102021010051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102021013099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5667833997 + ... + 5667834014.

It is an arithmetic number, because the mean of its divisors is an integer number (24560614026).

Almost surely, 2^102021012099 is an apocalyptic number.

102021012099 is a deficient number, since it is larger than the sum of its proper divisors (45342672057).

102021012099 is a wasteful number, since it uses less digits than its factorization.

102021012099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11335668017 (or 11335668014 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 102021012099 in words is "one hundred two billion, twenty-one million, twelve thousand, ninety-nine".