122102121999 has 192 divisors, whose sum is σ = 210118164480. Its totient is φ = 62047814400.

The previous prime is 122102121929. The next prime is 122102122031. The reversal of 122102121999 is 999121201221.

It is a happy number.

It is not a de Polignac number, because 122102121999 - 2¹⁹ = 122101597711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122102121929) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 749092692 + ... + 749092854.

It is an arithmetic number, because the mean of its divisors is an integer number (1094365440).

Almost surely, 2^122102121999 is an apocalyptic number.

122102121999 is a deficient number, since it is larger than the sum of its proper divisors (88016042481).

122102121999 is a wasteful number, since it uses less digits than its factorization.

122102121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 122102121999 in words is "one hundred twenty-two billion, one hundred two million, one hundred twenty-one thousand, nine hundred ninety-nine".