121122102112021 has 4 divisors (see below), whose sum is σ = 121122129292812. Its totient is φ = 121122074931232.

The previous prime is 121122102111977. The next prime is 121122102112087. The reversal of 121122102112021 is 120211201221121.

It is a happy number.

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 95542531471396 + 25579570640625 = 9774586^2 + 5057625^2 .

It is a cyclic number.

It is not a de Polignac number, because 121122102112021 - 2³⁷ = 120984663158549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121122102112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122102118021) 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, 5165056 + ... + 16398841.

It is an arithmetic number, because the mean of its divisors is an integer number (30280532323203).

Almost surely, 2^{121122102112021} is an apocalyptic number.

It is an amenable number.

121122102112021 is a deficient number, since it is larger than the sum of its proper divisors (27180791).

121122102112021 is an equidigital number, since it uses as much as digits as its factorization.

121122102112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27180790.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121122102112021 its reverse (120211201221121), we get a palindrome (241333303333142).

The spelling of 121122102112021 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred two million, one hundred twelve thousand, twenty-one".