111222201021 has 16 divisors (see below), whose sum is σ = 161263353024. Its totient is φ = 67900356864.

The previous prime is 111222200981. The next prime is 111222201029. The reversal of 111222201021 is 120102222111.

It is not a de Polignac number, because 111222201021 - 2³⁵ = 76862462653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222201029) 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, 29468755 + ... + 29472528.

It is an arithmetic number, because the mean of its divisors is an integer number (10078959564).

Almost surely, 2^111222201021 is an apocalyptic number.

It is an amenable number.

111222201021 is a deficient number, since it is larger than the sum of its proper divisors (50041152003).

111222201021 is a wasteful number, since it uses less digits than its factorization.

111222201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58941340.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111222201021 its reverse (120102222111), we get a palindrome (231324423132).

The spelling of 111222201021 in words is "one hundred eleven billion, two hundred twenty-two million, two hundred one thousand, twenty-one".