221102111121 has 8 divisors (see below), whose sum is σ = 302770458624. Its totient is φ = 143417585520.

The previous prime is 221102111101. The next prime is 221102111137. The reversal of 221102111121 is 121111201122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221102111121 - 2¹⁷ = 221101980049 is a prime.

It is a super-2 number, since 2×221102111121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221102111121.

It is not an unprimeable number, because it can be changed into a prime (221102111101) 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, 995955345 + ... + 995955566.

It is an arithmetic number, because the mean of its divisors is an integer number (37846307328).

Almost surely, 2^221102111121 is an apocalyptic number.

It is an amenable number.

221102111121 is a deficient number, since it is larger than the sum of its proper divisors (81668347503).

221102111121 is a wasteful number, since it uses less digits than its factorization.

221102111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991910951.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221102111121 its reverse (121111201122), we get a palindrome (342213312243).

Subtracting from 221102111121 its reverse (121111201122), we obtain a palindrome (99990909999).

The spelling of 221102111121 in words is "two hundred twenty-one billion, one hundred two million, one hundred eleven thousand, one hundred twenty-one".