121338708913 has 2 divisors, whose sum is σ = 121338708914. Its totient is φ = 121338708912.

The previous prime is 121338708871. The next prime is 121338708917. The reversal of 121338708913 is 319807833121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120313940769 + 1024768144 = 346863^2 + 32012^2 .

It is a cyclic number.

It is not a de Polignac number, because 121338708913 - 2²¹ = 121336611761 is a prime.

It is not a weakly prime, because it can be changed into another prime (121338708917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60669354456 + 60669354457.

It is an arithmetic number, because the mean of its divisors is an integer number (60669354457).

Almost surely, 2^121338708913 is an apocalyptic number.

It is an amenable number.

121338708913 is a deficient number, since it is larger than the sum of its proper divisors (1).

121338708913 is an equidigital number, since it uses as much as digits as its factorization.

121338708913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 121338708913 in words is "one hundred twenty-one billion, three hundred thirty-eight million, seven hundred eight thousand, nine hundred thirteen".