111231302021312 has 112 divisors (see below), whose sum is σ = 251265862785024. Its totient is φ = 48360238080000.

The previous prime is 111231302021237. The next prime is 111231302021317. The reversal of 111231302021312 is 213120203132111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (111231302021317) 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, 1067826512 + ... + 1067930672.

Almost surely, 2^{111231302021312} is an apocalyptic number.

It is an amenable number.

111231302021312 is an abundant number, since it is smaller than the sum of its proper divisors (140034560763712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111231302021312 is a wasteful number, since it uses less digits than its factorization.

111231302021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170158 (or 170148 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 111231302021312 its reverse (213120203132111), we get a palindrome (324351505153423).

The spelling of 111231302021312 in words is "one hundred eleven trillion, two hundred thirty-one billion, three hundred two million, twenty-one thousand, three hundred twelve".