331012133021 has 2 divisors, whose sum is σ = 331012133022. Its totient is φ = 331012133020.

The previous prime is 331012133003. The next prime is 331012133077. The reversal of 331012133021 is 120331210133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288142430521 + 42869702500 = 536789^2 + 207050^2 .

It is an emirp because it is prime and its reverse (120331210133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331012133021 - 2¹⁴ = 331012116637 is a prime.

It is a super-2 number, since 2×331012133021² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331012132984 and 331012133002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331012133821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165506066510 + 165506066511.

It is an arithmetic number, because the mean of its divisors is an integer number (165506066511).

Almost surely, 2^331012133021 is an apocalyptic number.

It is an amenable number.

331012133021 is a deficient number, since it is larger than the sum of its proper divisors (1).

331012133021 is an equidigital number, since it uses as much as digits as its factorization.

331012133021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 331012133021 its reverse (120331210133), we get a palindrome (451343343154).

The spelling of 331012133021 in words is "three hundred thirty-one billion, twelve million, one hundred thirty-three thousand, twenty-one".