22001233213 has 4 divisors (see below), whose sum is σ = 23295423420. Its totient is φ = 20707043008.

The previous prime is 22001233207. The next prime is 22001233223. The reversal of 22001233213 is 31233210022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20454148324 + 1547084889 = 143018^2 + 39333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22001233213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001233223) 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, 647095078 + ... + 647095111.

It is an arithmetic number, because the mean of its divisors is an integer number (5823855855).

Almost surely, 2^22001233213 is an apocalyptic number.

It is an amenable number.

22001233213 is a deficient number, since it is larger than the sum of its proper divisors (1294190207).

22001233213 is a wasteful number, since it uses less digits than its factorization.

22001233213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294190206.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 22001233213 its reverse (31233210022), we get a palindrome (53234443235).

The spelling of 22001233213 in words is "twenty-two billion, one million, two hundred thirty-three thousand, two hundred thirteen".