111112021021 has 8 divisors (see below), whose sum is σ = 112217827680. Its totient is φ = 110007462288.

The previous prime is 111112021019. The next prime is 111112021037. The reversal of 111112021021 is 120120211111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111112021021 - 2¹ = 111112021019 is a prime.

It is a super-2 number, since 2×111112021021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112020992 and 111112021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112021081) 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, 132511 + ... + 489676.

It is an arithmetic number, because the mean of its divisors is an integer number (14027228460).

Almost surely, 2^111112021021 is an apocalyptic number.

It is an amenable number.

111112021021 is a deficient number, since it is larger than the sum of its proper divisors (1105806659).

111112021021 is a wasteful number, since it uses less digits than its factorization.

111112021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623963.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111112021021 its reverse (120120211111), we get a palindrome (231232232132).

The spelling of 111112021021 in words is "one hundred eleven billion, one hundred twelve million, twenty-one thousand, twenty-one".