231123210121000 has 64 divisors (see below), whose sum is σ = 540953022851280. Its totient is φ = 92427965900800.

The previous prime is 231123210120977. The next prime is 231123210121009. The reversal of 231123210121000 is 121012321132.

It can be written as a sum of positive squares in 8 ways, for example, as 359949601764 + 230763260519236 = 599958^2 + 15190894^2 .

It is not an unprimeable number, because it can be changed into a prime (231123210121009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22308517 + ... + 30982516.

Almost surely, 2^{231123210121000} is an apocalyptic number.

231123210121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231123210121000 is an abundant number, since it is smaller than the sum of its proper divisors (309829812730280).

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

231123210121000 is a wasteful number, since it uses less digits than its factorization.

231123210121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53295391 (or 53295377 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231123210121000 its reverse (121012321132), we get a palindrome (231244222442132).

The spelling of 231123210121000 in words is "two hundred thirty-one trillion, one hundred twenty-three billion, two hundred ten million, one hundred twenty-one thousand".