111112211021 has 8 divisors (see below), whose sum is σ = 134455112640. Its totient is φ = 89636741568.

The previous prime is 111112211009. The next prime is 111112211057. The reversal of 111112211021 is 120112211111.

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

It is not a de Polignac number, because 111112211021 - 2³⁴ = 93932341837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112210987 and 111112211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112211521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466857911 + ... + 466858148.

It is an arithmetic number, because the mean of its divisors is an integer number (16806889080).

Almost surely, 2^111112211021 is an apocalyptic number.

It is an amenable number.

111112211021 is a deficient number, since it is larger than the sum of its proper divisors (23342901619).

111112211021 is an equidigital number, since it uses as much as digits as its factorization.

111112211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933716083.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111112211021 its reverse (120112211111), we get a palindrome (231224422132).

The spelling of 111112211021 in words is "one hundred eleven billion, one hundred twelve million, two hundred eleven thousand, twenty-one".