100102020989 has 4 divisors (see below), whose sum is σ = 100279822656. Its totient is φ = 99924219324.

The previous prime is 100102020979. The next prime is 100102021031. The reversal of 100102020989 is 989020201001.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 100102020989 - 2³⁶ = 31382544253 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 (100102020929) 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, 88899989 + ... + 88901114.

It is an arithmetic number, because the mean of its divisors is an integer number (25069955664).

Almost surely, 2^100102020989 is an apocalyptic number.

It is an amenable number.

100102020989 is a deficient number, since it is larger than the sum of its proper divisors (177801667).

100102020989 is an equidigital number, since it uses as much as digits as its factorization.

100102020989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177801666.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 100102020989 in words is "one hundred billion, one hundred two million, twenty thousand, nine hundred eighty-nine".