22031321111 has 4 divisors (see below), whose sum is σ = 22500072672. Its totient is φ = 21562569552.

The previous prime is 22031321093. The next prime is 22031321119. The reversal of 22031321111 is 11112313022.

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-22031321111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22031321111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031321119) 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, 234375710 + ... + 234375803.

It is an arithmetic number, because the mean of its divisors is an integer number (5625018168).

Almost surely, 2^22031321111 is an apocalyptic number.

22031321111 is a deficient number, since it is larger than the sum of its proper divisors (468751561).

22031321111 is an equidigital number, since it uses as much as digits as its factorization.

22031321111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468751560.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 22031321111 its reverse (11112313022), we get a palindrome (33143634133).

The spelling of 22031321111 in words is "twenty-two billion, thirty-one million, three hundred twenty-one thousand, one hundred eleven".