122100021999 has 20 divisors (see below), whose sum is σ = 182408223096. Its totient is φ = 81394706736.

The previous prime is 122100021971. The next prime is 122100022043. The reversal of 122100021999 is 999120001221.

It is not a de Polignac number, because 122100021999 - 2¹³ = 122100013807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122100021959) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1500412 + ... + 1579694.

Almost surely, 2^122100021999 is an apocalyptic number.

122100021999 is a deficient number, since it is larger than the sum of its proper divisors (60308201097).

122100021999 is an equidigital number, since it uses as much as digits as its factorization.

122100021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98308 (or 98299 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 122100021999 in words is "one hundred twenty-two billion, one hundred million, twenty-one thousand, nine hundred ninety-nine".