231220211030100 has 216 divisors, whose sum is σ = 735754728683520. Its totient is φ = 60728611680000.

The previous prime is 231220211030069. The next prime is 231220211030167. The reversal of 231220211030100 is 1030112022132.

231220211030100 is a `hidden beast` number, since 2 + 31 + 220 + 2 + 110 + 301 + 0 + 0 = 666.

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, 10703061 + ... + 24020739.

Almost surely, 2^{231220211030100} is an apocalyptic number.

231220211030100 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 231220211030100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367877364341760).

231220211030100 is an abundant number, since it is smaller than the sum of its proper divisors (504534517653420).

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

231220211030100 is a wasteful number, since it uses less digits than its factorization.

231220211030100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13317991 (or 13317981 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231220211030100 its reverse (1030112022132), we get a palindrome (232250323052232).

The spelling of 231220211030100 in words is "two hundred thirty-one trillion, two hundred twenty billion, two hundred eleven million, thirty thousand, one hundred".