231101313201220 has 96 divisors (see below), whose sum is σ = 607707463668480. Its totient is φ = 71717029655040.

The previous prime is 231101313201211. The next prime is 231101313201251. The reversal of 231101313201220 is 22102313101132.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 231101313201191 and 231101313201200.

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, 327301899 + ... + 328007218.

It is an arithmetic number, because the mean of its divisors is an integer number (6330286079880).

Almost surely, 2^{231101313201220} is an apocalyptic number.

231101313201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231101313201220 is an abundant number, since it is smaller than the sum of its proper divisors (376606150467260).

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

231101313201220 is a wasteful number, since it uses less digits than its factorization.

231101313201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655309373 (or 655309371 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 231101313201220 its reverse (22102313101132), we get a palindrome (253203626302352).

The spelling of 231101313201220 in words is "two hundred thirty-one trillion, one hundred one billion, three hundred thirteen million, two hundred one thousand, two hundred twenty".