121122200022121 has 16 divisors (see below), whose sum is σ = 122187197180160. Its totient is φ = 120061482730560.

The previous prime is 121122200022059. The next prime is 121122200022163. The reversal of 121122200022121 is 121220002221121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121122200022121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121122200022721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170984700 + ... + 171691618.

It is an arithmetic number, because the mean of its divisors is an integer number (7636699823760).

Almost surely, 2^{121122200022121} is an apocalyptic number.

It is an amenable number.

121122200022121 is a deficient number, since it is larger than the sum of its proper divisors (1064997158039).

121122200022121 is a wasteful number, since it uses less digits than its factorization.

121122200022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709944.

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

Adding to 121122200022121 its reverse (121220002221121), we get a palindrome (242342202243242).

The spelling of 121122200022121 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, two hundred million, twenty-two thousand, one hundred twenty-one".