331130330212021 has 4 divisors (see below), whose sum is σ = 331565455482444. Its totient is φ = 330695204941600.

The previous prime is 331130330211979. The next prime is 331130330212093. The reversal of 331130330212021 is 120212033031133.

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 81345265143921 + 249785065068100 = 9019161^2 + 15804590^2 .

It is a cyclic number.

It is not a de Polignac number, because 331130330212021 - 2¹⁹ = 331130329687733 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 (331130334212021) 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, 217562634070 + ... + 217562635591.

It is an arithmetic number, because the mean of its divisors is an integer number (82891363870611).

Almost surely, 2^{331130330212021} is an apocalyptic number.

It is an amenable number.

331130330212021 is a deficient number, since it is larger than the sum of its proper divisors (435125270423).

331130330212021 is an equidigital number, since it uses as much as digits as its factorization.

331130330212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435125270422.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 331130330212021 its reverse (120212033031133), we get a palindrome (451342363243154).

The spelling of 331130330212021 in words is "three hundred thirty-one trillion, one hundred thirty billion, three hundred thirty million, two hundred twelve thousand, twenty-one".