33220121213 has 2 divisors, whose sum is σ = 33220121214. Its totient is φ = 33220121212.

The previous prime is 33220121173. The next prime is 33220121279. The reversal of 33220121213 is 31212102233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30428266969 + 2791854244 = 174437^2 + 52838^2 .

It is a cyclic number.

It is not a de Polignac number, because 33220121213 - 2²⁰ = 33219072637 is a prime.

It is a super-2 number, since 2×33220121213² (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 (33220121293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16610060606 + 16610060607.

It is an arithmetic number, because the mean of its divisors is an integer number (16610060607).

Almost surely, 2^33220121213 is an apocalyptic number.

It is an amenable number.

33220121213 is a deficient number, since it is larger than the sum of its proper divisors (1).

33220121213 is an equidigital number, since it uses as much as digits as its factorization.

33220121213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 33220121213 its reverse (31212102233), we get a palindrome (64432223446).

The spelling of 33220121213 in words is "thirty-three billion, two hundred twenty million, one hundred twenty-one thousand, two hundred thirteen".