121201011923 has 2 divisors, whose sum is σ = 121201011924. Its totient is φ = 121201011922.

The previous prime is 121201011917. The next prime is 121201011929. The reversal of 121201011923 is 329110102121.

It is a balanced prime because it is at equal distance from previous prime (121201011917) and next prime (121201011929).

It is a cyclic number.

It is not a de Polignac number, because 121201011923 - 2⁸ = 121201011667 is a prime.

It is not a weakly prime, because it can be changed into another prime (121201011929) 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, 60600505961 + 60600505962.

It is an arithmetic number, because the mean of its divisors is an integer number (60600505962).

Almost surely, 2^121201011923 is an apocalyptic number.

121201011923 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201011923 is an equidigital number, since it uses as much as digits as its factorization.

121201011923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 121201011923 in words is "one hundred twenty-one billion, two hundred one million, eleven thousand, nine hundred twenty-three".