100321221220 has 48 divisors (see below), whose sum is σ = 233257082688. Its totient is φ = 35935954560.

The previous prime is 100321221211. The next prime is 100321221223. The reversal of 100321221220 is 22122123001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 100321221194 and 100321221203.

It is not an unprimeable number, because it can be changed into a prime (100321221223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3388287 + ... + 3417766.

It is an arithmetic number, because the mean of its divisors is an integer number (4859522556).

Almost surely, 2^100321221220 is an apocalyptic number.

100321221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100321221220 is an abundant number, since it is smaller than the sum of its proper divisors (132935861468).

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

100321221220 is a wasteful number, since it uses less digits than its factorization.

100321221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6806140 (or 6806138 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 100321221220 its reverse (22122123001), we get a palindrome (122443344221).

The spelling of 100321221220 in words is "one hundred billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty".