221120222221100 has 72 divisors (see below), whose sum is σ = 480381918464448. Its totient is φ = 88346548584000.

The previous prime is 221120222221057. The next prime is 221120222221127. The reversal of 221120222221100 is 1122222021122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 540745319 + ... + 541154081.

It is an arithmetic number, because the mean of its divisors is an integer number (6671971089784).

Almost surely, 2^{221120222221100} is an apocalyptic number.

221120222221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221120222221100 is an abundant number, since it is smaller than the sum of its proper divisors (259261696243348).

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

221120222221100 is a wasteful number, since it uses less digits than its factorization.

221120222221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414975 (or 414968 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221120222221100 its reverse (1122222021122), we get a palindrome (222242444242222).

The spelling of 221120222221100 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred".