221231101120 has 56 divisors (see below), whose sum is σ = 535735530000. Its totient is φ = 86992561152.

The previous prime is 221231101087. The next prime is 221231101127. The reversal of 221231101120 is 21101132122.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 221231101094 and 221231101103.

It is not an unprimeable number, because it can be changed into a prime (221231101127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5839995 + ... + 5877754.

Almost surely, 2^221231101120 is an apocalyptic number.

221231101120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221231101120 is an abundant number, since it is smaller than the sum of its proper divisors (314504428880).

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

221231101120 is a wasteful number, since it uses less digits than its factorization.

221231101120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11717825 (or 11717815 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221231101120 its reverse (21101132122), we get a palindrome (242332233242).

The spelling of 221231101120 in words is "two hundred twenty-one billion, two hundred thirty-one million, one hundred one thousand, one hundred twenty".