221020231100 has 18 divisors (see below), whose sum is σ = 479613901704. Its totient is φ = 88408092400.

The previous prime is 221020231021. The next prime is 221020231109. The reversal of 221020231100 is 1132020122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020231109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1105101056 + ... + 1105101255.

Almost surely, 2^221020231100 is an apocalyptic number.

221020231100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020231100 is an abundant number, since it is smaller than the sum of its proper divisors (258593670604).

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

221020231100 is a wasteful number, since it uses less digits than its factorization.

221020231100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210202325 (or 2210202318 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 221020231100 its reverse (1132020122), we get a palindrome (222152251222).

The spelling of 221020231100 in words is "two hundred twenty-one billion, twenty million, two hundred thirty-one thousand, one hundred".