121399980623 has 2 divisors, whose sum is σ = 121399980624. Its totient is φ = 121399980622.

The previous prime is 121399980607. The next prime is 121399980631. The reversal of 121399980623 is 326089993121.

It is a strong prime.

It is an emirp because it is prime and its reverse (326089993121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121399980623 - 2⁴ = 121399980607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121399983623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60699990311 + 60699990312.

It is an arithmetic number, because the mean of its divisors is an integer number (60699990312).

Almost surely, 2^121399980623 is an apocalyptic number.

121399980623 is a deficient number, since it is larger than the sum of its proper divisors (1).

121399980623 is an equidigital number, since it uses as much as digits as its factorization.

121399980623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The spelling of 121399980623 in words is "one hundred twenty-one billion, three hundred ninety-nine million, nine hundred eighty thousand, six hundred twenty-three".