22011012 has 72 divisors (see below), whose sum is σ = 58138080. Its totient is φ = 7015680.

The previous prime is 22011001. The next prime is 22011037. The reversal of 22011012 is 21011022.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 22010985 and 22011003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91212 + ... + 91452.

Almost surely, 2^22011012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22011012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29069040).

22011012 is an abundant number, since it is smaller than the sum of its proper divisors (36127068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22011012 is a wasteful number, since it uses less digits than its factorization.

22011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 22011012 is about 4691.5894961090. The cubic root of 22011012 is about 280.2506768690.

Adding to 22011012 its reverse (21011022), we get a palindrome (43022034).

The spelling of 22011012 in words is "twenty-two million, eleven thousand, twelve".