231021103320 has 128 divisors (see below), whose sum is σ = 880080422400. Its totient is φ = 52804821888.

The previous prime is 231021103309. The next prime is 231021103349. The reversal of 231021103320 is 23301120132.

231021103320 is a `hidden beast` number, since 2 + 310 + 21 + 1 + 0 + 332 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 231021103293 and 231021103302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15271614 + ... + 15286733.

It is an arithmetic number, because the mean of its divisors is an integer number (6875628300).

Almost surely, 2^231021103320 is an apocalyptic number.

231021103320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231021103320 is an abundant number, since it is smaller than the sum of its proper divisors (649059319080).

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

231021103320 is a wasteful number, since it uses less digits than its factorization.

231021103320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30558374 (or 30558364 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231021103320 its reverse (23301120132), we get a palindrome (254322223452).

The spelling of 231021103320 in words is "two hundred thirty-one billion, twenty-one million, one hundred three thousand, three hundred twenty".