331340001021 has 6 divisors (see below), whose sum is σ = 478602223710. Its totient is φ = 220893334008.

The previous prime is 331340001019. The next prime is 331340001059. The reversal of 331340001021 is 120100043133.

It can be written as a sum of positive squares in only one way, i.e., 187888438521 + 143451562500 = 433461^2 + 378750^2 .

It is not a de Polignac number, because 331340001021 - 2¹ = 331340001019 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 331340000985 and 331340001003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331340001011) 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 5 ways as a sum of consecutive naturals, for example, 18407777826 + ... + 18407777843.

It is an arithmetic number, because the mean of its divisors is an integer number (79767037285).

Almost surely, 2^331340001021 is an apocalyptic number.

It is an amenable number.

331340001021 is a deficient number, since it is larger than the sum of its proper divisors (147262222689).

331340001021 is a wasteful number, since it uses less digits than its factorization.

331340001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36815555675 (or 36815555672 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 331340001021 its reverse (120100043133), we get a palindrome (451440044154).

The spelling of 331340001021 in words is "three hundred thirty-one billion, three hundred forty million, one thousand, twenty-one".