20122122111121 has 16 divisors (see below), whose sum is σ = 20455598032704. Its totient is φ = 19789636958784.

The previous prime is 20122122111107. The next prime is 20122122111199. The reversal of 20122122111121 is 12111122122102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20122122111121 - 2⁵ = 20122122111089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20122122117121) 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, 173045826 + ... + 173162068.

It is an arithmetic number, because the mean of its divisors is an integer number (1278474877044).

Almost surely, 2^{20122122111121} is an apocalyptic number.

It is an amenable number.

20122122111121 is a deficient number, since it is larger than the sum of its proper divisors (333475921583).

20122122111121 is a wasteful number, since it uses less digits than its factorization.

20122122111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120480.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 20122122111121 its reverse (12111122122102), we get a palindrome (32233244233223).

The spelling of 20122122111121 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-two million, one hundred eleven thousand, one hundred twenty-one".