121379845871 has 2 divisors, whose sum is σ = 121379845872. Its totient is φ = 121379845870.

The previous prime is 121379845843. The next prime is 121379845901. The reversal of 121379845871 is 178548973121.

It is a weak prime.

It is an emirp because it is prime and its reverse (178548973121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121379845871 - 2¹⁸ = 121379583727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121379845571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60689922935 + 60689922936.

It is an arithmetic number, because the mean of its divisors is an integer number (60689922936).

Almost surely, 2^121379845871 is an apocalyptic number.

121379845871 is a deficient number, since it is larger than the sum of its proper divisors (1).

121379845871 is an equidigital number, since it uses as much as digits as its factorization.

121379845871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 56.

The spelling of 121379845871 in words is "one hundred twenty-one billion, three hundred seventy-nine million, eight hundred forty-five thousand, eight hundred seventy-one".