121355250312121 has 4 divisors (see below), whose sum is σ = 138691714642432. Its totient is φ = 104018785981812.

The previous prime is 121355250312097. The next prime is 121355250312157. The reversal of 121355250312121 is 121213052553121.

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 121355250312121 - 2⁵ = 121355250312089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121355250312421) 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, 8668232165145 + ... + 8668232165158.

It is an arithmetic number, because the mean of its divisors is an integer number (34672928660608).

Almost surely, 2^{121355250312121} is an apocalyptic number.

It is an amenable number.

121355250312121 is a deficient number, since it is larger than the sum of its proper divisors (17336464330311).

121355250312121 is an equidigital number, since it uses as much as digits as its factorization.

121355250312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17336464330310.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 121355250312121 in words is "one hundred twenty-one trillion, three hundred fifty-five billion, two hundred fifty million, three hundred twelve thousand, one hundred twenty-one".