121122211999 has 8 divisors (see below), whose sum is σ = 125034946688. Its totient is φ = 117209825280.

The previous prime is 121122211981. The next prime is 121122212021. The reversal of 121122211999 is 999112221121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121122211999 - 2¹¹ = 121122209951 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 (121122211919) 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 in 7 ways as a sum of consecutive naturals, for example, 747679 + ... + 895135.

It is an arithmetic number, because the mean of its divisors is an integer number (15629368336).

Almost surely, 2^121122211999 is an apocalyptic number.

121122211999 is a deficient number, since it is larger than the sum of its proper divisors (3912734689).

121122211999 is a wasteful number, since it uses less digits than its factorization.

121122211999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173985.

The product of its digits is 11664, while the sum is 40.

It can be divided in two parts, 1211222 and 11999, that added together give a palindrome (1223221).

The spelling of 121122211999 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, nine hundred ninety-nine".