33313412221 has 4 divisors (see below), whose sum is σ = 34761821472. Its totient is φ = 31865002972.

The previous prime is 33313412213. The next prime is 33313412233. The reversal of 33313412221 is 12221431333.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12221431333 = 4339 ⋅2816647.

It is a cyclic number.

It is not a de Polignac number, because 33313412221 - 2³ = 33313412213 is a prime.

It is a super-2 number, since 2×33313412221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33313412021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724204591 + ... + 724204636.

It is an arithmetic number, because the mean of its divisors is an integer number (8690455368).

Almost surely, 2^33313412221 is an apocalyptic number.

It is an amenable number.

33313412221 is a deficient number, since it is larger than the sum of its proper divisors (1448409251).

33313412221 is a wasteful number, since it uses less digits than its factorization.

33313412221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448409250.

The product of its digits is 2592, while the sum is 25.

Adding to 33313412221 its reverse (12221431333), we get a palindrome (45534843554).

The spelling of 33313412221 in words is "thirty-three billion, three hundred thirteen million, four hundred twelve thousand, two hundred twenty-one".