111231123212122 has 4 divisors (see below), whose sum is σ = 166846684818186. Its totient is φ = 55615561606060.

The previous prime is 111231123212119. The next prime is 111231123212123. The reversal of 111231123212122 is 221212321132111.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 94563002371201 + 16668120840921 = 9724351^2 + 4082661^2 .

It is not an unprimeable number, because it can be changed into a prime (111231123212123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27807780803029 + ... + 27807780803032.

Almost surely, 2^{111231123212122} is an apocalyptic number.

111231123212122 is a deficient number, since it is larger than the sum of its proper divisors (55615561606064).

111231123212122 is an equidigital number, since it uses as much as digits as its factorization.

111231123212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55615561606063.

The product of its digits is 576, while the sum is 25.

Adding to 111231123212122 its reverse (221212321132111), we get a palindrome (332443444344233).

The spelling of 111231123212122 in words is "one hundred eleven trillion, two hundred thirty-one billion, one hundred twenty-three million, two hundred twelve thousand, one hundred twenty-two".