33312030221 has 2 divisors, whose sum is σ = 33312030222. Its totient is φ = 33312030220.

The previous prime is 33312030203. The next prime is 33312030229. The reversal of 33312030221 is 12203021333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27993974596 + 5318055625 = 167314^2 + 72925^2 .

It is a cyclic number.

It is not a de Polignac number, because 33312030221 - 2³⁴ = 16132161037 is a prime.

It is a super-2 number, since 2×33312030221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33312030193 and 33312030202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33312030229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16656015110 + 16656015111.

It is an arithmetic number, because the mean of its divisors is an integer number (16656015111).

Almost surely, 2^33312030221 is an apocalyptic number.

It is an amenable number.

33312030221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33312030221 is an equidigital number, since it uses as much as digits as its factorization.

33312030221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 33312030221 its reverse (12203021333), we get a palindrome (45515051554).

The spelling of 33312030221 in words is "thirty-three billion, three hundred twelve million, thirty thousand, two hundred twenty-one".