33213021223 has 4 divisors (see below), whose sum is σ = 34657065648. Its totient is φ = 31768976800.

The previous prime is 33213021187. The next prime is 33213021229. The reversal of 33213021223 is 32212031233.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33213021223 is a prime.

It is a super-2 number, since 2×33213021223² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33213021194 and 33213021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33213021229) 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, 722022178 + ... + 722022223.

It is an arithmetic number, because the mean of its divisors is an integer number (8664266412).

Almost surely, 2^33213021223 is an apocalyptic number.

33213021223 is a deficient number, since it is larger than the sum of its proper divisors (1444044425).

33213021223 is a wasteful number, since it uses less digits than its factorization.

33213021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444044424.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 33213021223 its reverse (32212031233), we get a palindrome (65425052456).

It can be divided in two parts, 332130 and 21223, that added together give a palindrome (353353).

The spelling of 33213021223 in words is "thirty-three billion, two hundred thirteen million, twenty-one thousand, two hundred twenty-three".