121330231999 has 2 divisors, whose sum is σ = 121330232000. Its totient is φ = 121330231998.

The previous prime is 121330231969. The next prime is 121330232011. The reversal of 121330231999 is 999132033121.

It is a strong prime.

It is an emirp because it is prime and its reverse (999132033121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121330231999 - 2⁹ = 121330231487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121330231969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60665115999 + 60665116000.

It is an arithmetic number, because the mean of its divisors is an integer number (60665116000).

Almost surely, 2^121330231999 is an apocalyptic number.

121330231999 is a deficient number, since it is larger than the sum of its proper divisors (1).

121330231999 is an equidigital number, since it uses as much as digits as its factorization.

121330231999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 43.

The spelling of 121330231999 in words is "one hundred twenty-one billion, three hundred thirty million, two hundred thirty-one thousand, nine hundred ninety-nine".