33313331213 has 2 divisors, whose sum is σ = 33313331214. Its totient is φ = 33313331212.

The previous prime is 33313331203. The next prime is 33313331221. The reversal of 33313331213 is 31213331333.

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., 29976767044 + 3336564169 = 173138^2 + 57763^2 .

It is a cyclic number.

It is not a de Polignac number, because 33313331213 - 2¹⁶ = 33313265677 is a prime.

It is a super-2 number, since 2×33313331213² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33313331203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16656665606 + 16656665607.

It is an arithmetic number, because the mean of its divisors is an integer number (16656665607).

Almost surely, 2^33313331213 is an apocalyptic number.

It is an amenable number.

33313331213 is a deficient number, since it is larger than the sum of its proper divisors (1).

33313331213 is an equidigital number, since it uses as much as digits as its factorization.

33313331213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4374, while the sum is 26.

Adding to 33313331213 its reverse (31213331333), we get a palindrome (64526662546).

The spelling of 33313331213 in words is "thirty-three billion, three hundred thirteen million, three hundred thirty-one thousand, two hundred thirteen".