22031221133 has 8 divisors (see below), whose sum is σ = 22703894808. Its totient is φ = 21362612544.

The previous prime is 22031221129. The next prime is 22031221151. The reversal of 22031221133 is 33112213022.

It can be written as a sum of positive squares in 4 ways, for example, as 11443222729 + 10587998404 = 106973^2 + 102898^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22031221133 - 2² = 22031221129 is a prime.

It is a super-2 number, since 2×22031221133² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031221193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005266 + ... + 1026947.

It is an arithmetic number, because the mean of its divisors is an integer number (2837986851).

Almost surely, 2^22031221133 is an apocalyptic number.

It is an amenable number.

22031221133 is a deficient number, since it is larger than the sum of its proper divisors (672673675).

22031221133 is a wasteful number, since it uses less digits than its factorization.

22031221133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032543.

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

Adding to 22031221133 its reverse (33112213022), we get a palindrome (55143434155).

The spelling of 22031221133 in words is "twenty-two billion, thirty-one million, two hundred twenty-one thousand, one hundred thirty-three".