111222012002021 has 4 divisors (see below), whose sum is σ = 111222164372172. Its totient is φ = 111221859631872.

The previous prime is 111222012001979. The next prime is 111222012002041. The reversal of 111222012002021 is 120200210222111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45165268101121 + 66056743900900 = 6720511^2 + 8127530^2 .

It is a cyclic number.

It is not a de Polignac number, because 111222012002021 - 2¹⁰ = 111222012000997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222012002041) 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, 75084860 + ... + 76551813.

It is an arithmetic number, because the mean of its divisors is an integer number (27805541093043).

Almost surely, 2^{111222012002021} is an apocalyptic number.

It is an amenable number.

111222012002021 is a deficient number, since it is larger than the sum of its proper divisors (152370151).

111222012002021 is an equidigital number, since it uses as much as digits as its factorization.

111222012002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152370150.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111222012002021 its reverse (120200210222111), we get a palindrome (231422222224132).

The spelling of 111222012002021 in words is "one hundred eleven trillion, two hundred twenty-two billion, twelve million, two thousand, twenty-one".