331121100231020 has 48 divisors (see below), whose sum is σ = 758643427277568. Its totient is φ = 120395753991360.

The previous prime is 331121100230989. The next prime is 331121100231023. The reversal of 331121100231020 is 20132001121133.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 331121100230983 and 331121100231001.

It is not an unprimeable number, because it can be changed into a prime (331121100231023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72264914 + ... + 76710233.

It is an arithmetic number, because the mean of its divisors is an integer number (15805071401616).

Almost surely, 2^{331121100231020} is an apocalyptic number.

It is an amenable number.

331121100231020 is an abundant number, since it is smaller than the sum of its proper divisors (427522327046548).

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

331121100231020 is a wasteful number, since it uses less digits than its factorization.

331121100231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148985270 (or 148985268 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 331121100231020 its reverse (20132001121133), we get a palindrome (351253101352153).

The spelling of 331121100231020 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, one hundred million, two hundred thirty-one thousand, twenty".