22011111012 has 96 divisors (see below), whose sum is σ = 61369902720. Its totient is φ = 6061189120.

The previous prime is 22011111011. The next prime is 22011111019. The reversal of 22011111012 is 21011111022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22011111011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104043 + ... + 234194.

It is an arithmetic number, because the mean of its divisors is an integer number (639269820).

Almost surely, 2^22011111012 is an apocalyptic number.

22011111012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22011111012 is an abundant number, since it is smaller than the sum of its proper divisors (39358791708).

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

22011111012 is a wasteful number, since it uses less digits than its factorization.

22011111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338301 (or 338299 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 22011111012 its reverse (21011111022), we get a palindrome (43022222034).

The spelling of 22011111012 in words is "twenty-two billion, eleven million, one hundred eleven thousand, twelve".