231220133221302 has 80 divisors (see below), whose sum is σ = 558674805150000. Its totient is φ = 71235984522240.

The previous prime is 231220133221151. The next prime is 231220133221309. The reversal of 231220133221302 is 203122331022132.

231220133221302 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 2 + 0 + 1 + 332 + 21 + 302 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231220133221309) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 915974427 + ... + 916226822.

It is an arithmetic number, because the mean of its divisors is an integer number (6983435064375).

Almost surely, 2^{231220133221302} is an apocalyptic number.

231220133221302 is an abundant number, since it is smaller than the sum of its proper divisors (327454671928698).

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

231220133221302 is a wasteful number, since it uses less digits than its factorization.

231220133221302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832201323 (or 1832201314 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 231220133221302 its reverse (203122331022132), we get a palindrome (434342464243434).

The spelling of 231220133221302 in words is "two hundred thirty-one trillion, two hundred twenty billion, one hundred thirty-three million, two hundred twenty-one thousand, three hundred two".