102002021200 has 30 divisors (see below), whose sum is σ = 245059856894. Its totient is φ = 40800808320.

The previous prime is 102002021183. The next prime is 102002021279. The reversal of 102002021200 is 2120200201.

It can be written as a sum of positive squares in 3 ways, for example, as 5161560336 + 96840460864 = 71844^2 + 311192^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127502127 + ... + 127502926.

Almost surely, 2^102002021200 is an apocalyptic number.

102002021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102002021200 is an abundant number, since it is smaller than the sum of its proper divisors (143057835694).

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

102002021200 is a wasteful number, since it uses less digits than its factorization.

102002021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255005071 (or 255005060 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 102002021200 its reverse (2120200201), we get a palindrome (104122221401).

The spelling of 102002021200 in words is "one hundred two billion, two million, twenty-one thousand, two hundred".