11023220312 has 128 divisors (see below), whose sum is σ = 23826700800. Its totient is φ = 4744396800.

The previous prime is 11023220311. The next prime is 11023220321. The reversal of 11023220312 is 21302232011.

It is a super-2 number, since 2×11023220312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11023220311) 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, 11763908 + ... + 11764844.

It is an arithmetic number, because the mean of its divisors is an integer number (186146100).

Almost surely, 2^11023220312 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 11023220312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11913350400).

11023220312 is an abundant number, since it is smaller than the sum of its proper divisors (12803480488).

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

11023220312 is a wasteful number, since it uses less digits than its factorization.

11023220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 11023220312 its reverse (21302232011), we get a palindrome (32325452323).

The spelling of 11023220312 in words is "eleven billion, twenty-three million, two hundred twenty thousand, three hundred twelve".