102110021000 has 64 divisors (see below), whose sum is σ = 257317285680. Its totient is φ = 37702156800.

The previous prime is 102110020973. The next prime is 102110021021. The reversal of 102110021000 is 120011201.

It can be written as a sum of positive squares in 8 ways, for example, as 3818992804 + 98291028196 = 61798^2 + 313514^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3914309 + ... + 3940308.

Almost surely, 2^102110021000 is an apocalyptic number.

102110021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102110021000 is an abundant number, since it is smaller than the sum of its proper divisors (155207264680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102110021000 is a wasteful number, since it uses less digits than its factorization.

102110021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7854651 (or 7854637 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 102110021000 its reverse (120011201), we get a palindrome (102230032201).

The spelling of 102110021000 in words is "one hundred two billion, one hundred ten million, twenty-one thousand".