33231221022 has 8 divisors (see below), whose sum is σ = 66462442056. Its totient is φ = 11077073672.

The previous prime is 33231221011. The next prime is 33231221029. The reversal of 33231221022 is 22012213233.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

33231221022 is an admirable number.

It is a super-2 number, since 2×33231221022² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33231221022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33231221029) 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, 2769268413 + ... + 2769268424.

It is an arithmetic number, because the mean of its divisors is an integer number (8307805257).

Almost surely, 2^33231221022 is an apocalyptic number.

33231221022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33231221022 is a wasteful number, since it uses less digits than its factorization.

33231221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538536842.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 33231221022 its reverse (22012213233), we get a palindrome (55243434255).

The spelling of 33231221022 in words is "thirty-three billion, two hundred thirty-one million, two hundred twenty-one thousand, twenty-two".