121399444423 has 2 divisors, whose sum is σ = 121399444424. Its totient is φ = 121399444422.

The previous prime is 121399444393. The next prime is 121399444451. The reversal of 121399444423 is 324444993121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121399444423 - 2²¹ = 121397347271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121399444223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60699722211 + 60699722212.

It is an arithmetic number, because the mean of its divisors is an integer number (60699722212).

Almost surely, 2^121399444423 is an apocalyptic number.

121399444423 is a deficient number, since it is larger than the sum of its proper divisors (1).

121399444423 is an equidigital number, since it uses as much as digits as its factorization.

121399444423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 46.

The spelling of 121399444423 in words is "one hundred twenty-one billion, three hundred ninety-nine million, four hundred forty-four thousand, four hundred twenty-three".