231111332000020 has 48 divisors (see below), whose sum is σ = 485459932499136. Its totient is φ = 92420509248000.

The previous prime is 231111331999993. The next prime is 231111332000047. The reversal of 231111332000020 is 20000233111132.

It is an interprime number because it is at equal distance from previous prime (231111331999993) and next prime (231111332000047).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2044434700 + ... + 2044547740.

It is an arithmetic number, because the mean of its divisors is an integer number (10113748593732).

Almost surely, 2^{231111332000020} is an apocalyptic number.

231111332000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231111332000020 is an abundant number, since it is smaller than the sum of its proper divisors (254348600499116).

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

231111332000020 is a wasteful number, since it uses less digits than its factorization.

231111332000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138712 (or 138710 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 231111332000020 its reverse (20000233111132), we get a palindrome (251111565111152).

The spelling of 231111332000020 in words is "two hundred thirty-one trillion, one hundred eleven billion, three hundred thirty-two million, twenty", and thus it is an aban number.