22123111012 has 6 divisors (see below), whose sum is σ = 38715444278. Its totient is φ = 11061555504.

The previous prime is 22123111001. The next prime is 22123111061. The reversal of 22123111012 is 21011132122.

It can be written as a sum of positive squares in only one way, i.e., 19842666496 + 2280444516 = 140864^2 + 47754^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765388873 + ... + 2765388880.

Almost surely, 2^22123111012 is an apocalyptic number.

It is an amenable number.

22123111012 is a deficient number, since it is larger than the sum of its proper divisors (16592333266).

22123111012 is a wasteful number, since it uses less digits than its factorization.

22123111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530777757 (or 5530777755 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 22123111012 its reverse (21011132122), we get a palindrome (43134243134).

The spelling of 22123111012 in words is "twenty-two billion, one hundred twenty-three million, one hundred eleven thousand, twelve".