121345879 has 2 divisors, whose sum is σ = 121345880. Its totient is φ = 121345878.

The previous prime is 121345877. The next prime is 121345883. The reversal of 121345879 is 978543121.

It is a weak prime.

It is an emirp because it is prime and its reverse (978543121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121345879 - 2¹ = 121345877 is a prime.

Together with 121345877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121345877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60672939 + 60672940.

It is an arithmetic number, because the mean of its divisors is an integer number (60672940).

Almost surely, 2^121345879 is an apocalyptic number.

121345879 is a deficient number, since it is larger than the sum of its proper divisors (1).

121345879 is an equidigital number, since it uses as much as digits as its factorization.

121345879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 121345879 is about 11015.7105535685. The cubic root of 121345879 is about 495.0795763642.

The spelling of 121345879 in words is "one hundred twenty-one million, three hundred forty-five thousand, eight hundred seventy-nine".