231100221100 has 288 divisors, whose sum is σ = 613850711040. Its totient is φ = 73811189760.

The previous prime is 231100221097. The next prime is 231100221103. The reversal of 231100221100 is 1122001132.

It is an interprime number because it is at equal distance from previous prime (231100221097) and next prime (231100221103).

It is not an unprimeable number, because it can be changed into a prime (231100221103) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 107337624 + ... + 107339776.

It is an arithmetic number, because the mean of its divisors is an integer number (2131426080).

Almost surely, 2^231100221100 is an apocalyptic number.

231100221100 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 231100221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306925355520).

231100221100 is an abundant number, since it is smaller than the sum of its proper divisors (382750489940).

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

231100221100 is a wasteful number, since it uses less digits than its factorization.

231100221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369 (or 2362 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 231100221100 its reverse (1122001132), we get a palindrome (232222222232).

The spelling of 231100221100 in words is "two hundred thirty-one billion, one hundred million, two hundred twenty-one thousand, one hundred".