121103123291 has 2 divisors, whose sum is σ = 121103123292. Its totient is φ = 121103123290.

The previous prime is 121103123147. The next prime is 121103123293. The reversal of 121103123291 is 192321301121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121103123291 - 2²⁶ = 121036014427 is a prime.

Together with 121103123293, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121103123291.

It is not a weakly prime, because it can be changed into another prime (121103123293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551561645 + 60551561646.

It is an arithmetic number, because the mean of its divisors is an integer number (60551561646).

Almost surely, 2^121103123291 is an apocalyptic number.

121103123291 is a deficient number, since it is larger than the sum of its proper divisors (1).

121103123291 is an equidigital number, since it uses as much as digits as its factorization.

121103123291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 121103123291 in words is "one hundred twenty-one billion, one hundred three million, one hundred twenty-three thousand, two hundred ninety-one".