231321001100 has 72 divisors (see below), whose sum is σ = 574223747328. Its totient is φ = 79234344000.

The previous prime is 231321001091. The next prime is 231321001111. The reversal of 231321001100 is 1100123132.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 578489 + ... + 892911.

It is an arithmetic number, because the mean of its divisors is an integer number (7975329824).

Almost surely, 2^231321001100 is an apocalyptic number.

231321001100 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 231321001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287111873664).

231321001100 is an abundant number, since it is smaller than the sum of its proper divisors (342902746228).

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

231321001100 is a wasteful number, since it uses less digits than its factorization.

231321001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315495 (or 315488 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 231321001100 its reverse (1100123132), we get a palindrome (232421124232).

The spelling of 231321001100 in words is "two hundred thirty-one billion, three hundred twenty-one million, one thousand, one hundred".