100012215440 has 40 divisors (see below), whose sum is σ = 232774119360. Its totient is φ = 39962612096.

The previous prime is 100012215437. The next prime is 100012215451. The reversal of 100012215440 is 44512210001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584300 + ... + 735819.

It is an arithmetic number, because the mean of its divisors is an integer number (5819352984).

Almost surely, 2^100012215440 is an apocalyptic number.

100012215440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100012215440 is an abundant number, since it is smaller than the sum of its proper divisors (132761903920).

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

100012215440 is a wasteful number, since it uses less digits than its factorization.

100012215440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321079 (or 1321073 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 100012215440 its reverse (44512210001), we get a palindrome (144524425441).

The spelling of 100012215440 in words is "one hundred billion, twelve million, two hundred fifteen thousand, four hundred forty".