100402021240 has 64 divisors (see below), whose sum is σ = 227824876800. Its totient is φ = 39820505088.

The previous prime is 100402021163. The next prime is 100402021259. The reversal of 100402021240 is 42120204001.

It is a super-2 number, since 2×100402021240² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 2991432 + ... + 3024808.

It is an arithmetic number, because the mean of its divisors is an integer number (3559763700).

Almost surely, 2^100402021240 is an apocalyptic number.

100402021240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100402021240 is an abundant number, since it is smaller than the sum of its proper divisors (127422855560).

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

100402021240 is a wasteful number, since it uses less digits than its factorization.

100402021240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34024 (or 34020 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 100402021240 its reverse (42120204001), we get a palindrome (142522225241).

The spelling of 100402021240 in words is "one hundred billion, four hundred two million, twenty-one thousand, two hundred forty".