111222121135 has 4 divisors (see below), whose sum is σ = 133466545368. Its totient is φ = 88977696904.

The previous prime is 111222121133. The next prime is 111222121139. The reversal of 111222121135 is 531121222111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 531121222111 = 5087 ⋅104407553.

It is a cyclic number.

It is not a de Polignac number, because 111222121135 - 2¹ = 111222121133 is a prime.

It is a super-2 number, since 2×111222121135² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222121133) 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, 11122212109 + ... + 11122212118.

It is an arithmetic number, because the mean of its divisors is an integer number (33366636342).

Almost surely, 2^111222121135 is an apocalyptic number.

111222121135 is a deficient number, since it is larger than the sum of its proper divisors (22244424233).

111222121135 is an equidigital number, since it uses as much as digits as its factorization.

111222121135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22244424232.

The product of its digits is 240, while the sum is 22.

Adding to 111222121135 its reverse (531121222111), we get a palindrome (642343343246).

The spelling of 111222121135 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred thirty-five".