221110122221011 has 4 divisors (see below), whose sum is σ = 221208349732024. Its totient is φ = 221011894710000.

The previous prime is 221110122220997. The next prime is 221110122221057. The reversal of 221110122221011 is 110122221011122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221110122221011 - 2⁵ = 221110122220979 is a prime.

It is a super-2 number, since 2×221110122221011² (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 221110122221011.

It is not an unprimeable number, because it can be changed into a prime (221110122221081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49113752130 + ... + 49113756631.

It is an arithmetic number, because the mean of its divisors is an integer number (55302087433006).

Almost surely, 2^{221110122221011} is an apocalyptic number.

221110122221011 is a deficient number, since it is larger than the sum of its proper divisors (98227511013).

221110122221011 is an equidigital number, since it uses as much as digits as its factorization.

221110122221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98227511012.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221110122221011 its reverse (110122221011122), we get a palindrome (331232343232133).

The spelling of 221110122221011 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred twenty-two million, two hundred twenty-one thousand, eleven".