112221020202121 has 4 divisors (see below), whose sum is σ = 112221041394244. Its totient is φ = 112220999010000.

The previous prime is 112221020202097. The next prime is 112221020202173. The reversal of 112221020202121 is 121202020122211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 102852456224400 + 9368563977721 = 10141620^2 + 3060811^2 .

It is a cyclic number.

It is not a de Polignac number, because 112221020202121 - 2²⁵ = 112220986647689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112221020203121) 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, 4944691 + ... + 15776311.

It is an arithmetic number, because the mean of its divisors is an integer number (28055260348561).

Almost surely, 2^{112221020202121} is an apocalyptic number.

It is an amenable number.

112221020202121 is a deficient number, since it is larger than the sum of its proper divisors (21192123).

112221020202121 is a wasteful number, since it uses less digits than its factorization.

112221020202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21192122.

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

Adding to 112221020202121 its reverse (121202020122211), we get a palindrome (233423040324332).

The spelling of 112221020202121 in words is "one hundred twelve trillion, two hundred twenty-one billion, twenty million, two hundred two thousand, one hundred twenty-one".