102021210999 has 48 divisors (see below), whose sum is σ = 159430003200. Its totient is φ = 62646706368.

The previous prime is 102021210971. The next prime is 102021211001. The reversal of 102021210999 is 999012120201.

It is not a de Polignac number, because 102021210999 - 2²⁵ = 101987656567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021210959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9858622 + ... + 9868964.

It is an arithmetic number, because the mean of its divisors is an integer number (3321458400).

Almost surely, 2^102021210999 is an apocalyptic number.

102021210999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

102021210999 is a deficient number, since it is larger than the sum of its proper divisors (57408792201).

102021210999 is a wasteful number, since it uses less digits than its factorization.

102021210999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11964 (or 11961 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 102021210999 in words is "one hundred two billion, twenty-one million, two hundred ten thousand, nine hundred ninety-nine".