121855191103 has 2 divisors, whose sum is σ = 121855191104. Its totient is φ = 121855191102.

The previous prime is 121855191061. The next prime is 121855191131. The reversal of 121855191103 is 301191558121.

It is a strong prime.

It is an emirp because it is prime and its reverse (301191558121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121855191103 - 2²⁹ = 121318320191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121855197103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60927595551 + 60927595552.

It is an arithmetic number, because the mean of its divisors is an integer number (60927595552).

Almost surely, 2^121855191103 is an apocalyptic number.

121855191103 is a deficient number, since it is larger than the sum of its proper divisors (1).

121855191103 is an equidigital number, since it uses as much as digits as its factorization.

121855191103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 37.

The spelling of 121855191103 in words is "one hundred twenty-one billion, eight hundred fifty-five million, one hundred ninety-one thousand, one hundred three".