111201011021021 has 16 divisors (see below), whose sum is σ = 117891791729280. Its totient is φ = 104526929633280.

The previous prime is 111201011021003. The next prime is 111201011021029. The reversal of 111201011021021 is 120120110102111.

It is a cyclic number.

It is not a de Polignac number, because 111201011021021 - 2¹⁰ = 111201011019997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111201011020987 and 111201011021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201011021029) 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, 41505056 + ... + 44102966.

It is an arithmetic number, because the mean of its divisors is an integer number (7368236983080).

Almost surely, 2^{111201011021021} is an apocalyptic number.

It is an amenable number.

111201011021021 is a deficient number, since it is larger than the sum of its proper divisors (6690780708259).

111201011021021 is a wasteful number, since it uses less digits than its factorization.

111201011021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2601124.

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

Adding to 111201011021021 its reverse (120120110102111), we get a palindrome (231321121123132).

The spelling of 111201011021021 in words is "one hundred eleven trillion, two hundred one billion, eleven million, twenty-one thousand, twenty-one".