111000220120021 has 8 divisors (see below), whose sum is σ = 112191789231704. Its totient is φ = 109815006044160.

The previous prime is 111000220120019. The next prime is 111000220120123. The reversal of 111000220120021 is 120021022000111.

It can be written as a sum of positive squares in 4 ways, for example, as 1413114675025 + 109587105444996 = 1188745^2 + 10468386^2 .

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 111000220120021 - 2¹ = 111000220120019 is a prime.

It is a super-2 number, since 2×111000220120021² (a number of 29 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 = 111000220119983 and 111000220120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000220150021) 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, 1588723836 + ... + 1588793701.

It is an arithmetic number, because the mean of its divisors is an integer number (14023973653963).

Almost surely, 2^{111000220120021} is an apocalyptic number.

It is an amenable number.

111000220120021 is a deficient number, since it is larger than the sum of its proper divisors (1191569111683).

111000220120021 is a wasteful number, since it uses less digits than its factorization.

111000220120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177517911.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111000220120021 its reverse (120021022000111), we get a palindrome (231021242120132).

The spelling of 111000220120021 in words is "one hundred eleven trillion, two hundred twenty million, one hundred twenty thousand, twenty-one".