231111132032220 has 48 divisors (see below), whose sum is σ = 705939457845888. Its totient is φ = 56026941098560.

The previous prime is 231111132032201. The next prime is 231111132032227. The reversal of 231111132032220 is 22230231111132.

231111132032220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231111132032227) 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, 175084190274 + ... + 175084191593.

It is an arithmetic number, because the mean of its divisors is an integer number (14707072038456).

Almost surely, 2^{231111132032220} is an apocalyptic number.

231111132032220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231111132032220 is an abundant number, since it is smaller than the sum of its proper divisors (474828325813668).

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

231111132032220 is a wasteful number, since it uses less digits than its factorization.

231111132032220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350168381890 (or 350168381888 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 231111132032220 its reverse (22230231111132), we get a palindrome (253341363143352).

The spelling of 231111132032220 in words is "two hundred thirty-one trillion, one hundred eleven billion, one hundred thirty-two million, thirty-two thousand, two hundred twenty".