112121002022221 has 4 divisors (see below), whose sum is σ = 112184961523132. Its totient is φ = 112057042521312.

The previous prime is 112121002022177. The next prime is 112121002022251. The reversal of 112121002022221 is 122220200121211.

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 7764275738025 + 104356726284196 = 2786445^2 + 10215514^2 .

It is a cyclic number.

It is not a de Polignac number, because 112121002022221 - 2¹¹ = 112121002020173 is a prime.

It is a super-2 number, since 2×112121002022221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121002022251) 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, 31979747826 + ... + 31979751331.

It is an arithmetic number, because the mean of its divisors is an integer number (28046240380783).

Almost surely, 2^{112121002022221} is an apocalyptic number.

It is an amenable number.

112121002022221 is a deficient number, since it is larger than the sum of its proper divisors (63959500911).

112121002022221 is an equidigital number, since it uses as much as digits as its factorization.

112121002022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63959500910.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 112121002022221 its reverse (122220200121211), we get a palindrome (234341202143432).

The spelling of 112121002022221 in words is "one hundred twelve trillion, one hundred twenty-one billion, two million, twenty-two thousand, two hundred twenty-one".