11112121120121 has 16 divisors (see below), whose sum is σ = 13137749303040. Its totient is φ = 9196051824960.

The previous prime is 11112121120109. The next prime is 11112121120181. The reversal of 11112121120121 is 12102112121111.

It is not a de Polignac number, because 11112121120121 - 2³⁴ = 11094941250937 is a prime.

It is a super-2 number, since 2×11112121120121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11112121120121.

It is not an unprimeable number, because it can be changed into a prime (11112121120181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9979991 + ... + 11037411.

It is an arithmetic number, because the mean of its divisors is an integer number (821109331440).

Almost surely, 2^{11112121120121} is an apocalyptic number.

It is an amenable number.

11112121120121 is a deficient number, since it is larger than the sum of its proper divisors (2025628182919).

11112121120121 is a wasteful number, since it uses less digits than its factorization.

11112121120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109224.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11112121120121 its reverse (12102112121111), we get a palindrome (23214233241232).

The spelling of 11112121120121 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twenty-one".