22001323331 has 4 divisors (see below), whose sum is σ = 23693732832. Its totient is φ = 20308913832.

The previous prime is 22001323319. The next prime is 22001323339. The reversal of 22001323331 is 13332310022.

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-22001323331 is a prime.

It is a super-2 number, since 2×22001323331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001323339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846204731 + ... + 846204756.

It is an arithmetic number, because the mean of its divisors is an integer number (5923433208).

Almost surely, 2^22001323331 is an apocalyptic number.

22001323331 is a deficient number, since it is larger than the sum of its proper divisors (1692409501).

22001323331 is a wasteful number, since it uses less digits than its factorization.

22001323331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692409500.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 22001323331 its reverse (13332310022), we get a palindrome (35333633353).

The spelling of 22001323331 in words is "twenty-two billion, one million, three hundred twenty-three thousand, three hundred thirty-one".