101111111112221 has 32 divisors (see below), whose sum is σ = 124371793029120. Its totient is φ = 80275685688000.

The previous prime is 101111111112199. The next prime is 101111111112283. The reversal of 101111111112221 is 122211111111101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 101111111112221 - 2²² = 101111106917917 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 101111111112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101111111012221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35959055 + ... + 38668796.

It is an arithmetic number, because the mean of its divisors is an integer number (3886618532160).

Almost surely, 2^{101111111112221} is an apocalyptic number.

It is an amenable number.

101111111112221 is a deficient number, since it is larger than the sum of its proper divisors (23260681916899).

101111111112221 is a wasteful number, since it uses less digits than its factorization.

101111111112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74628105.

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 101111111112221 its reverse (122211111111101), we get a palindrome (223322222223322).

The spelling of 101111111112221 in words is "one hundred one trillion, one hundred eleven billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty-one".