231111311120 has 20 divisors (see below), whose sum is σ = 537333798540. Its totient is φ = 92444524416.

The previous prime is 231111311113. The next prime is 231111311141. The reversal of 231111311120 is 21113111132.

It can be written as a sum of positive squares in 2 ways, for example, as 170179350784 + 60931960336 = 412528^2 + 246844^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1444445615 + ... + 1444445774.

It is an arithmetic number, because the mean of its divisors is an integer number (26866689927).

Almost surely, 2^231111311120 is an apocalyptic number.

231111311120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231111311120 is an abundant number, since it is smaller than the sum of its proper divisors (306222487420).

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

231111311120 is a wasteful number, since it uses less digits than its factorization.

231111311120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888891402 (or 2888891396 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 231111311120 its reverse (21113111132), we get a palindrome (252224422252).

The spelling of 231111311120 in words is "two hundred thirty-one billion, one hundred eleven million, three hundred eleven thousand, one hundred twenty".