111122010121121 has 4 divisors (see below), whose sum is σ = 111222210311700. Its totient is φ = 111021809930544.

The previous prime is 111122010121099. The next prime is 111122010121151. The reversal of 111122010121121 is 121121010221111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1321706619025 + 109800303502096 = 1149655^2 + 10478564^2 .

It is a cyclic number.

It is not a de Polignac number, because 111122010121121 - 2¹⁰ = 111122010120097 is a prime.

It is a super-2 number, since 2×111122010121121² (a number of 29 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 111122010121121.

It is not an unprimeable number, because it can be changed into a prime (111122010121151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50100093626 + ... + 50100095843.

It is an arithmetic number, because the mean of its divisors is an integer number (27805552577925).

Almost surely, 2^{111122010121121} is an apocalyptic number.

It is an amenable number.

111122010121121 is a deficient number, since it is larger than the sum of its proper divisors (100200190579).

111122010121121 is a wasteful number, since it uses less digits than its factorization.

111122010121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100200190578.

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

Adding to 111122010121121 its reverse (121121010221111), we get a palindrome (232243020342232).

The spelling of 111122010121121 in words is "one hundred eleven trillion, one hundred twenty-two billion, ten million, one hundred twenty-one thousand, one hundred twenty-one".