221100122111122 has 8 divisors (see below), whose sum is σ = 334692845397900. Its totient is φ = 109535840311824.

The previous prime is 221100122111101. The next prime is 221100122111153. The reversal of 221100122111122 is 221111221001122.

It is a happy number.

221100122111122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 178900014373201 + 42200107737921 = 13375351^2 + 6496161^2 .

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

It is a super-4 number, since 4×221100122111122⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 221100122111122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507110371597 + ... + 507110372032.

Almost surely, 2^{221100122111122} is an apocalyptic number.

221100122111122 is a deficient number, since it is larger than the sum of its proper divisors (113592723286778).

221100122111122 is a wasteful number, since it uses less digits than its factorization.

221100122111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014220743740.

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

Adding to 221100122111122 its reverse (221111221001122), we get a palindrome (442211343112244).

The spelling of 221100122111122 in words is "two hundred twenty-one trillion, one hundred billion, one hundred twenty-two million, one hundred eleven thousand, one hundred twenty-two".