100221031974 has 128 divisors (see below), whose sum is σ = 248885747712. Its totient is φ = 26248642560.

The previous prime is 100221031973. The next prime is 100221031987. The reversal of 100221031974 is 479130122001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221031973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19698859 + ... + 19703945.

It is an arithmetic number, because the mean of its divisors is an integer number (1944419904).

Almost surely, 2^100221031974 is an apocalyptic number.

100221031974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 100221031974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124442873856).

100221031974 is an abundant number, since it is smaller than the sum of its proper divisors (148664715738).

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

100221031974 is a wasteful number, since it uses less digits than its factorization.

100221031974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830.

The product of its (nonzero) digits is 3024, while the sum is 30.

Adding to 100221031974 its reverse (479130122001), we get a palindrome (579351153975).

The spelling of 100221031974 in words is "one hundred billion, two hundred twenty-one million, thirty-one thousand, nine hundred seventy-four".