111021022112221 has 16 divisors (see below), whose sum is σ = 122110029828864. Its totient is φ = 100296328405824.

The previous prime is 111021022112159. The next prime is 111021022112227. The reversal of 111021022112221 is 122211220120111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111021022112221 - 2⁹ = 111021022111709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021022112227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10980630 + ... + 18509896.

It is an arithmetic number, because the mean of its divisors is an integer number (7631876864304).

Almost surely, 2^{111021022112221} is an apocalyptic number.

It is an amenable number.

111021022112221 is a deficient number, since it is larger than the sum of its proper divisors (11089007716643).

111021022112221 is a wasteful number, since it uses less digits than its factorization.

111021022112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7553460.

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

Adding to 111021022112221 its reverse (122211220120111), we get a palindrome (233232242232332).

The spelling of 111021022112221 in words is "one hundred eleven trillion, twenty-one billion, twenty-two million, one hundred twelve thousand, two hundred twenty-one".