21030213000997 has 2 divisors, whose sum is σ = 21030213000998. Its totient is φ = 21030213000996.

The previous prime is 21030213000947. The next prime is 21030213001013. The reversal of 21030213000997 is 79900031203012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20948251609476 + 81961391521 = 4576926^2 + 286289^2 .

It is a cyclic number.

It is not a de Polignac number, because 21030213000997 - 2¹⁹ = 21030212476709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21030213000947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515106500498 + 10515106500499.

It is an arithmetic number, because the mean of its divisors is an integer number (10515106500499).

Almost surely, 2^{21030213000997} is an apocalyptic number.

It is an amenable number.

21030213000997 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030213000997 is an equidigital number, since it uses as much as digits as its factorization.

21030213000997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The spelling of 21030213000997 in words is "twenty-one trillion, thirty billion, two hundred thirteen million, nine hundred ninety-seven", and thus it is an aban number.