331334220124021 has 4 divisors (see below), whose sum is σ = 332160490000044. Its totient is φ = 330507950248000.

The previous prime is 331334220124007. The next prime is 331334220124097. The reversal of 331334220124021 is 120421022433133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 236372605843396 + 94961614280625 = 15374414^2 + 9744825^2 .

It is a cyclic number.

It is not a de Polignac number, because 331334220124021 - 2⁵ = 331334220123989 is a prime.

It is a super-2 number, since 2×331334220124021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331334220127021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413134937410 + ... + 413134938211.

It is an arithmetic number, because the mean of its divisors is an integer number (83040122500011).

Almost surely, 2^{331334220124021} is an apocalyptic number.

It is an amenable number.

331334220124021 is a deficient number, since it is larger than the sum of its proper divisors (826269876023).

331334220124021 is an equidigital number, since it uses as much as digits as its factorization.

331334220124021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826269876022.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 331334220124021 its reverse (120421022433133), we get a palindrome (451755242557154).

The spelling of 331334220124021 in words is "three hundred thirty-one trillion, three hundred thirty-four billion, two hundred twenty million, one hundred twenty-four thousand, twenty-one".