102010100 has 18 divisors (see below), whose sum is σ = 221362134. Its totient is φ = 40804000.

The previous prime is 102010099. The next prime is 102010123. The reversal of 102010100 is 1010201.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 36626704 + 65383396 = 6052^2 + 8086^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

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, 509951 + ... + 510150.

Almost surely, 2^102010100 is an apocalyptic number.

102010100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102010100 is an abundant number, since it is smaller than the sum of its proper divisors (119352034).

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

102010100 is a wasteful number, since it uses less digits than its factorization.

102010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020115 (or 1020108 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 102010100 is about 10100.0049504938. The cubic root of 102010100 is about 467.2482940651.

Adding to 102010100 its reverse (1010201), we get a palindrome (103020301).

The spelling of 102010100 in words is "one hundred two million, ten thousand, one hundred".