111011112020021 has 4 divisors (see below), whose sum is σ = 115837682107872. Its totient is φ = 106184541932172.

The previous prime is 111011112019979. The next prime is 111011112020047. The reversal of 111011112020021 is 120020211110111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111011112020021 - 2¹⁸ = 111011111757877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111011112019978 and 111011112020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011112010021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2413285043891 + ... + 2413285043936.

It is an arithmetic number, because the mean of its divisors is an integer number (28959420526968).

Almost surely, 2^{111011112020021} is an apocalyptic number.

It is an amenable number.

111011112020021 is a deficient number, since it is larger than the sum of its proper divisors (4826570087851).

111011112020021 is an equidigital number, since it uses as much as digits as its factorization.

111011112020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826570087850.

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

Adding to 111011112020021 its reverse (120020211110111), we get a palindrome (231031323130132).

The spelling of 111011112020021 in words is "one hundred eleven trillion, eleven billion, one hundred twelve million, twenty thousand, twenty-one".