121503511091 has 2 divisors, whose sum is σ = 121503511092. Its totient is φ = 121503511090.

The previous prime is 121503510923. The next prime is 121503511097. The reversal of 121503511091 is 190115305121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121503511091 - 2¹⁰ = 121503510067 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121503511097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60751755545 + 60751755546.

It is an arithmetic number, because the mean of its divisors is an integer number (60751755546).

Almost surely, 2^121503511091 is an apocalyptic number.

121503511091 is a deficient number, since it is larger than the sum of its proper divisors (1).

121503511091 is an equidigital number, since it uses as much as digits as its factorization.

121503511091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 29.

The spelling of 121503511091 in words is "one hundred twenty-one billion, five hundred three million, five hundred eleven thousand, ninety-one".