121155479914123 has 2 divisors, whose sum is σ = 121155479914124. Its totient is φ = 121155479914122.

The previous prime is 121155479914111. The next prime is 121155479914237. The reversal of 121155479914123 is 321419974551121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121155479914123 is a prime.

It is not a weakly prime, because it can be changed into another prime (121155479914823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60577739957061 + 60577739957062.

It is an arithmetic number, because the mean of its divisors is an integer number (60577739957062).

Almost surely, 2^{121155479914123} is an apocalyptic number.

121155479914123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121155479914123 is an equidigital number, since it uses as much as digits as its factorization.

121155479914123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 55.

The spelling of 121155479914123 in words is "one hundred twenty-one trillion, one hundred fifty-five billion, four hundred seventy-nine million, nine hundred fourteen thousand, one hundred twenty-three".