121455374093 has 4 divisors (see below), whose sum is σ = 121475782428. Its totient is φ = 121434965760.

The previous prime is 121455374017. The next prime is 121455374129. The reversal of 121455374093 is 390473554121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 390473554121 = 7 ⋅55781936303.

It can be written as a sum of positive squares in 2 ways, for example, as 8157160489 + 113298213604 = 90317^2 + 336598^2 .

It is a cyclic number.

It is not a de Polignac number, because 121455374093 - 2²² = 121451179789 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 (121455374003) 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, 10195238 + ... + 10207143.

It is an arithmetic number, because the mean of its divisors is an integer number (30368945607).

Almost surely, 2^121455374093 is an apocalyptic number.

It is an amenable number.

121455374093 is a deficient number, since it is larger than the sum of its proper divisors (20408335).

121455374093 is an equidigital number, since it uses as much as digits as its factorization.

121455374093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20408334.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 121455374093 in words is "one hundred twenty-one billion, four hundred fifty-five million, three hundred seventy-four thousand, ninety-three".