1021660465013 has 2 divisors, whose sum is σ = 1021660465014. Its totient is φ = 1021660465012.

The previous prime is 1021660464973. The next prime is 1021660465043. The reversal of 1021660465013 is 3105640661201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1010463227524 + 11197237489 = 1005218^2 + 105817^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021660465013 - 2⁶ = 1021660464949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021660465043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510830232506 + 510830232507.

It is an arithmetic number, because the mean of its divisors is an integer number (510830232507).

Almost surely, 2^{1021660465013} is an apocalyptic number.

It is an amenable number.

1021660465013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021660465013 is an equidigital number, since it uses as much as digits as its factorization.

1021660465013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 1021660465013 in words is "one trillion, twenty-one billion, six hundred sixty million, four hundred sixty-five thousand, thirteen".