100031220040 has 32 divisors (see below), whose sum is σ = 234855910080. Its totient is φ = 38272814272.

The previous prime is 100031219941. The next prime is 100031220041. The reversal of 100031220040 is 40022130001.

It is a self number, because there is not a number n which added to its sum of digits gives 100031220040.

It is not an unprimeable number, because it can be changed into a prime (100031220041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54363874 + ... + 54365713.

It is an arithmetic number, because the mean of its divisors is an integer number (7339247190).

Almost surely, 2^100031220040 is an apocalyptic number.

100031220040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100031220040 is an abundant number, since it is smaller than the sum of its proper divisors (134824690040).

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

100031220040 is a wasteful number, since it uses less digits than its factorization.

100031220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108729621 (or 108729617 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 100031220040 its reverse (40022130001), we get a palindrome (140053350041).

The spelling of 100031220040 in words is "one hundred billion, thirty-one million, two hundred twenty thousand, forty".