100320231220 has 72 divisors (see below), whose sum is σ = 232178738400. Its totient is φ = 36383497920.

The previous prime is 100320231217. The next prime is 100320231223. The reversal of 100320231220 is 22132023001.

It is an interprime number because it is at equal distance from previous prime (100320231217) and next prime (100320231223).

It is a junction number, because it is equal to n+sod(n) for n = 100320231194 and 100320231203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100320231223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 862491 + ... + 971869.

It is an arithmetic number, because the mean of its divisors is an integer number (3224704700).

Almost surely, 2^100320231220 is an apocalyptic number.

100320231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100320231220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116089369200).

100320231220 is an abundant number, since it is smaller than the sum of its proper divisors (131858507180).

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

100320231220 is a wasteful number, since it uses less digits than its factorization.

100320231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109789 (or 109776 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 100320231220 its reverse (22132023001), we get a palindrome (122452254221).

The spelling of 100320231220 in words is "one hundred billion, three hundred twenty million, two hundred thirty-one thousand, two hundred twenty".