221111221002 has 48 divisors (see below), whose sum is σ = 528325348320. Its totient is φ = 61467208992.

The previous prime is 221111220991. The next prime is 221111221003. The reversal of 221111221002 is 200122111122.

It is not an unprimeable number, because it can be changed into a prime (221111221003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10152352 + ... + 10174107.

It is an arithmetic number, because the mean of its divisors is an integer number (11006778090).

Almost surely, 2^221111221002 is an apocalyptic number.

221111221002 is an abundant number, since it is smaller than the sum of its proper divisors (307214127318).

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

221111221002 is a wasteful number, since it uses less digits than its factorization.

221111221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20326515 (or 20326508 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221111221002 its reverse (200122111122), we get a palindrome (421233332124).

The spelling of 221111221002 in words is "two hundred twenty-one billion, one hundred eleven million, two hundred twenty-one thousand, two".