102021220999 has 8 divisors (see below), whose sum is σ = 106354926720. Its totient is φ = 97752684000.

The previous prime is 102021220979. The next prime is 102021221021. The reversal of 102021220999 is 999022120201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102021220999 - 2⁷ = 102021220871 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 (102021220909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16288984 + ... + 16295245.

It is an arithmetic number, because the mean of its divisors is an integer number (13294365840).

Almost surely, 2^102021220999 is an apocalyptic number.

102021220999 is a deficient number, since it is larger than the sum of its proper divisors (4333705721).

102021220999 is a wasteful number, since it uses less digits than its factorization.

102021220999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32584361.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 102021220999 in words is "one hundred two billion, twenty-one million, two hundred twenty thousand, nine hundred ninety-nine".