231121021103100 has 216 divisors, whose sum is σ = 733273155014400. Its totient is φ = 60880661504640.

The previous prime is 231121021103083. The next prime is 231121021103221. The reversal of 231121021103100 is 1301120121132.

231121021103100 is a `hidden beast` number, since 2 + 31 + 1 + 210 + 2 + 110 + 310 + 0 = 666.

It is a super-2 number, since 2×231121021103100² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 509750301 + ... + 510203499.

Almost surely, 2^{231121021103100} is an apocalyptic number.

231121021103100 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 231121021103100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366636577507200).

231121021103100 is an abundant number, since it is smaller than the sum of its proper divisors (502152133911300).

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

231121021103100 is a wasteful number, since it uses less digits than its factorization.

231121021103100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460129 (or 460119 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 231121021103100 its reverse (1301120121132), we get a palindrome (232422141224232).

The spelling of 231121021103100 in words is "two hundred thirty-one trillion, one hundred twenty-one billion, twenty-one million, one hundred three thousand, one hundred".