33013243212421 has 2 divisors, whose sum is σ = 33013243212422. Its totient is φ = 33013243212420.

The previous prime is 33013243212403. The next prime is 33013243212427. The reversal of 33013243212421 is 12421234231033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22809115740321 + 10204127472100 = 4775889^2 + 3194390^2 .

It is an emirp because it is prime and its reverse (12421234231033) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33013243212421 - 2¹⁹ = 33013242688133 is a prime.

It is a super-2 number, since 2×33013243212421² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33013243212427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16506621606210 + 16506621606211.

It is an arithmetic number, because the mean of its divisors is an integer number (16506621606211).

Almost surely, 2^{33013243212421} is an apocalyptic number.

It is an amenable number.

33013243212421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33013243212421 is an equidigital number, since it uses as much as digits as its factorization.

33013243212421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 33013243212421 its reverse (12421234231033), we get a palindrome (45434477443454).

The spelling of 33013243212421 in words is "thirty-three trillion, thirteen billion, two hundred forty-three million, two hundred twelve thousand, four hundred twenty-one".