231121110000000 has 512 divisors, whose sum is σ = 837156481873920. Its totient is φ = 56029280000000.

The previous prime is 231121109999993. The next prime is 231121110000013. The reversal of 231121110000000 is 11121132.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 329649817 + ... + 330350183.

It is an arithmetic number, because the mean of its divisors is an integer number (1635071253660).

Almost surely, 2^{231121110000000} is an apocalyptic number.

231121110000000 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 231121110000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418578240936960).

231121110000000 is an abundant number, since it is smaller than the sum of its proper divisors (606035371873920).

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

231121110000000 is an frugal number, since it uses more digits than its factorization.

231121110000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700430 (or 700388 counting only the distinct ones).

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

Adding to 231121110000000 its reverse (11121132), we get a palindrome (231121121121132).

The spelling of 231121110000000 in words is "two hundred thirty-one trillion, one hundred twenty-one billion, one hundred ten million", and thus it is an aban number.