221102021011121 has 4 divisors (see below), whose sum is σ = 221110490107632. Its totient is φ = 221093551914612.

The previous prime is 221102021011019. The next prime is 221102021011139. The reversal of 221102021011121 is 121110120201122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221102021011121 is a prime.

It is a super-2 number, since 2×221102021011121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221102021011121.

It is not an unprimeable number, because it can be changed into a prime (221102021011181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4234509095 + ... + 4234561308.

It is an arithmetic number, because the mean of its divisors is an integer number (55277622526908).

Almost surely, 2^{221102021011121} is an apocalyptic number.

It is an amenable number.

221102021011121 is a deficient number, since it is larger than the sum of its proper divisors (8469096511).

221102021011121 is an equidigital number, since it uses as much as digits as its factorization.

221102021011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8469096510.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221102021011121 its reverse (121110120201122), we get a palindrome (342212141212243).

The spelling of 221102021011121 in words is "two hundred twenty-one trillion, one hundred two billion, twenty-one million, eleven thousand, one hundred twenty-one".