221100331020 has 96 divisors (see below), whose sum is σ = 623333491200. Its totient is φ = 58555928064.

The previous prime is 221100331007. The next prime is 221100331043. The reversal of 221100331020 is 20133001122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8675937 + ... + 8701383.

It is an arithmetic number, because the mean of its divisors is an integer number (6493057200).

Almost surely, 2^221100331020 is an apocalyptic number.

221100331020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221100331020 is an abundant number, since it is smaller than the sum of its proper divisors (402233160180).

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

221100331020 is a wasteful number, since it uses less digits than its factorization.

221100331020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26447 (or 26445 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 221100331020 its reverse (20133001122), we get a palindrome (241233332142).

The spelling of 221100331020 in words is "two hundred twenty-one billion, one hundred million, three hundred thirty-one thousand, twenty".