331312112123021 has 8 divisors (see below), whose sum is σ = 347431690561080. Its totient is φ = 315505535208192.

The previous prime is 331312112122969. The next prime is 331312112123093. The reversal of 331312112123021 is 120321211213133.

It can be written as a sum of positive squares in 4 ways, for example, as 71372269100521 + 259939843022500 = 8448211^2 + 16122650^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331312112123021 - 2³⁴ = 331294932253837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331312112123221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78250378640 + ... + 78250382873.

It is an arithmetic number, because the mean of its divisors is an integer number (43428961320135).

Almost surely, 2^{331312112123021} is an apocalyptic number.

It is an amenable number.

331312112123021 is a deficient number, since it is larger than the sum of its proper divisors (16119578438059).

331312112123021 is a wasteful number, since it uses less digits than its factorization.

331312112123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156500761615.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 331312112123021 its reverse (120321211213133), we get a palindrome (451633323336154).

The spelling of 331312112123021 in words is "three hundred thirty-one trillion, three hundred twelve billion, one hundred twelve million, one hundred twenty-three thousand, twenty-one".