231121131000 has 128 divisors (see below), whose sum is σ = 732919786560. Its totient is φ = 60621888000.

The previous prime is 231121130993. The next prime is 231121131013. The reversal of 231121131000 is 131121132.

It is a happy number.

231121131000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231121131000² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448479 + ... + 814478.

Almost surely, 2^231121131000 is an apocalyptic number.

231121131000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231121131000 is an abundant number, since it is smaller than the sum of its proper divisors (501798655560).

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

231121131000 is a wasteful number, since it uses less digits than its factorization.

231121131000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263042 (or 1263028 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 231121131000 its reverse (131121132), we get a palindrome (231252252132).

The spelling of 231121131000 in words is "two hundred thirty-one billion, one hundred twenty-one million, one hundred thirty-one thousand".