121253221054177 has 2 divisors, whose sum is σ = 121253221054178. Its totient is φ = 121253221054176.

The previous prime is 121253221054129. The next prime is 121253221054193. The reversal of 121253221054177 is 771450122352121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90167254974736 + 31085966079441 = 9495644^2 + 5575479^2 .

It is a cyclic number.

It is not a de Polignac number, because 121253221054177 - 2²³ = 121253212665569 is a prime.

It is a super-2 number, since 2×121253221054177² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121253221004177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60626610527088 + 60626610527089.

It is an arithmetic number, because the mean of its divisors is an integer number (60626610527089).

Almost surely, 2^{121253221054177} is an apocalyptic number.

It is an amenable number.

121253221054177 is a deficient number, since it is larger than the sum of its proper divisors (1).

121253221054177 is an equidigital number, since it uses as much as digits as its factorization.

121253221054177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 121253221054177 in words is "one hundred twenty-one trillion, two hundred fifty-three billion, two hundred twenty-one million, fifty-four thousand, one hundred seventy-seven".