102001100 has 18 divisors (see below), whose sum is σ = 221342604. Its totient is φ = 40800400.

The previous prime is 102001099. The next prime is 102001121. The reversal of 102001100 is 1100201.

It is a happy number.

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

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, 509906 + ... + 510105.

Almost surely, 2^102001100 is an apocalyptic number.

102001100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102001100 is an abundant number, since it is smaller than the sum of its proper divisors (119341504).

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

102001100 is a wasteful number, since it uses less digits than its factorization.

102001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020025 (or 1020018 counting only the distinct ones).

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

The square root of 102001100 is about 10099.5593963301. The cubic root of 102001100 is about 467.2345524248.

Adding to 102001100 its reverse (1100201), we get a palindrome (103101301).

The spelling of 102001100 in words is "one hundred two million, one thousand, one hundred".