122001221121 has 16 divisors (see below), whose sum is σ = 175373587200. Its totient is φ = 74995240320.

The previous prime is 122001221117. The next prime is 122001221179. The reversal of 122001221121 is 121122100221.

It is not a de Polignac number, because 122001221121 - 2² = 122001221117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122001221121.

It is not an unprimeable number, because it can be changed into a prime (122001221921) 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 15 ways as a sum of consecutive naturals, for example, 1681396 + ... + 1752453.

It is an arithmetic number, because the mean of its divisors is an integer number (10960849200).

Almost surely, 2^122001221121 is an apocalyptic number.

It is an amenable number.

122001221121 is a deficient number, since it is larger than the sum of its proper divisors (53372366079).

122001221121 is a wasteful number, since it uses less digits than its factorization.

122001221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434776.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 122001221121 its reverse (121122100221), we get a palindrome (243123321342).

It can be divided in two parts, 12200 and 1221121, that added together give a palindrome (1233321).

The spelling of 122001221121 in words is "one hundred twenty-two billion, one million, two hundred twenty-one thousand, one hundred twenty-one".