1031330012021 has 2 divisors, whose sum is σ = 1031330012022. Its totient is φ = 1031330012020.

The previous prime is 1031330012003. The next prime is 1031330012051. The reversal of 1031330012021 is 1202100331301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 936077535121 + 95252476900 = 967511^2 + 308630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031330012021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031330012051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515665006010 + 515665006011.

It is an arithmetic number, because the mean of its divisors is an integer number (515665006011).

Almost surely, 2^{1031330012021} is an apocalyptic number.

It is an amenable number.

1031330012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031330012021 is an equidigital number, since it uses as much as digits as its factorization.

1031330012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1031330012021 its reverse (1202100331301), we get a palindrome (2233430343322).

The spelling of 1031330012021 in words is "one trillion, thirty-one billion, three hundred thirty million, twelve thousand, twenty-one".