331012010021 has 16 divisors (see below), whose sum is σ = 412708220928. Its totient is φ = 257920234800.

The previous prime is 331012009969. The next prime is 331012010051. The reversal of 331012010021 is 120010210133.

It is a cyclic number.

It is not a de Polignac number, because 331012010021 - 2⁶ = 331012009957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 331012009978 and 331012010005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331012010051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1991636 + ... + 2151426.

It is an arithmetic number, because the mean of its divisors is an integer number (25794263808).

Almost surely, 2^331012010021 is an apocalyptic number.

It is an amenable number.

331012010021 is a deficient number, since it is larger than the sum of its proper divisors (81696210907).

331012010021 is a wasteful number, since it uses less digits than its factorization.

331012010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186712.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 331012010021 its reverse (120010210133), we get a palindrome (451022220154).

The spelling of 331012010021 in words is "three hundred thirty-one billion, twelve million, ten thousand, twenty-one".