231111020100 has 144 divisors (see below), whose sum is σ = 705799270400. Its totient is φ = 58226325120.

The previous prime is 231111020089. The next prime is 231111020117. The reversal of 231111020100 is 1020111132.

231111020100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231111020100² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2036661 + ... + 2147139.

Almost surely, 2^231111020100 is an apocalyptic number.

231111020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231111020100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352899635200).

231111020100 is an abundant number, since it is smaller than the sum of its proper divisors (474688250300).

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

231111020100 is a wasteful number, since it uses less digits than its factorization.

231111020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110882 (or 110875 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 231111020100 its reverse (1020111132), we get a palindrome (232131131232).

The spelling of 231111020100 in words is "two hundred thirty-one billion, one hundred eleven million, twenty thousand, one hundred".