122121100999 has 16 divisors (see below), whose sum is σ = 125878999680. Its totient is φ = 118402560000.

The previous prime is 122121100987. The next prime is 122121101023. The reversal of 122121100999 is 999001121221.

It is a cyclic number.

It is not a de Polignac number, because 122121100999 - 2⁹ = 122121100487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121100939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4441807 + ... + 4469215.

It is an arithmetic number, because the mean of its divisors is an integer number (7867437480).

Almost surely, 2^122121100999 is an apocalyptic number.

122121100999 is a deficient number, since it is larger than the sum of its proper divisors (3757898681).

122121100999 is a wasteful number, since it uses less digits than its factorization.

122121100999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28122.

The product of its (nonzero) digits is 5832, while the sum is 37.

It can be divided in two parts, 122 and 121100999, that added together give a palindrome (121101121).

The spelling of 122121100999 in words is "one hundred twenty-two billion, one hundred twenty-one million, one hundred thousand, nine hundred ninety-nine".