33230311021 has 2 divisors, whose sum is σ = 33230311022. Its totient is φ = 33230311020.

The previous prime is 33230311007. The next prime is 33230311063. The reversal of 33230311021 is 12011303233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32956408521 + 273902500 = 181539^2 + 16550^2 .

It is a cyclic number.

It is not a de Polignac number, because 33230311021 - 2¹¹ = 33230308973 is a prime.

It is a super-2 number, since 2×33230311021² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33230311021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33230312021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16615155510 + 16615155511.

It is an arithmetic number, because the mean of its divisors is an integer number (16615155511).

Almost surely, 2^33230311021 is an apocalyptic number.

It is an amenable number.

33230311021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33230311021 is an equidigital number, since it uses as much as digits as its factorization.

33230311021 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 19.

Adding to 33230311021 its reverse (12011303233), we get a palindrome (45241614254).

The spelling of 33230311021 in words is "thirty-three billion, two hundred thirty million, three hundred eleven thousand, twenty-one".