121273000399 has 2 divisors, whose sum is σ = 121273000400. Its totient is φ = 121273000398.

The previous prime is 121273000379. The next prime is 121273000447. The reversal of 121273000399 is 993000372121.

121273000399 = 142167² + 142168² + ... + 142172².

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121273000399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121273000369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60636500199 + 60636500200.

It is an arithmetic number, because the mean of its divisors is an integer number (60636500200).

Almost surely, 2^121273000399 is an apocalyptic number.

121273000399 is a deficient number, since it is larger than the sum of its proper divisors (1).

121273000399 is an equidigital number, since it uses as much as digits as its factorization.

121273000399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The spelling of 121273000399 in words is "one hundred twenty-one billion, two hundred seventy-three million, three hundred ninety-nine", and thus it is an aban number.