121112022220021 has 4 divisors (see below), whose sum is σ = 138413739680032. Its totient is φ = 103810304760012.

The previous prime is 121112022219949. The next prime is 121112022220027. The reversal of 121112022220021 is 120022220211121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121112022220021 - 2³⁷ = 120974583266549 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 (121112022220027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8650858729995 + ... + 8650858730008.

It is an arithmetic number, because the mean of its divisors is an integer number (34603434920008).

Almost surely, 2^{121112022220021} is an apocalyptic number.

It is an amenable number.

121112022220021 is a deficient number, since it is larger than the sum of its proper divisors (17301717460011).

121112022220021 is an equidigital number, since it uses as much as digits as its factorization.

121112022220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17301717460010.

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

Adding to 121112022220021 its reverse (120022220211121), we get a palindrome (241134242431142).

The spelling of 121112022220021 in words is "one hundred twenty-one trillion, one hundred twelve billion, twenty-two million, two hundred twenty thousand, twenty-one".