33213240121 has 2 divisors, whose sum is σ = 33213240122. Its totient is φ = 33213240120.

The previous prime is 33213240041. The next prime is 33213240157. The reversal of 33213240121 is 12104231233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20317366521 + 12895873600 = 142539^2 + 113560^2 .

It is a cyclic number.

It is not a de Polignac number, because 33213240121 - 2⁷ = 33213239993 is a prime.

It is a super-2 number, since 2×33213240121² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33213240092 and 33213240101.

It is not a weakly prime, because it can be changed into another prime (33213240191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16606620060 + 16606620061.

It is an arithmetic number, because the mean of its divisors is an integer number (16606620061).

Almost surely, 2^33213240121 is an apocalyptic number.

It is an amenable number.

33213240121 is a deficient number, since it is larger than the sum of its proper divisors (1).

33213240121 is an equidigital number, since it uses as much as digits as its factorization.

33213240121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 33213240121 its reverse (12104231233), we get a palindrome (45317471354).

The spelling of 33213240121 in words is "thirty-three billion, two hundred thirteen million, two hundred forty thousand, one hundred twenty-one".