22123402312 has 16 divisors (see below), whose sum is σ = 45252414000. Its totient is φ = 10056091920.

The previous prime is 22123402303. The next prime is 22123402313. The reversal of 22123402312 is 21320432122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (22123402313) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 125701062 + ... + 125701237.

It is an arithmetic number, because the mean of its divisors is an integer number (2828275875).

Almost surely, 2^22123402312 is an apocalyptic number.

22123402312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22123402312 is an abundant number, since it is smaller than the sum of its proper divisors (23129011688).

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

22123402312 is a wasteful number, since it uses less digits than its factorization.

22123402312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251402316 (or 251402312 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 22123402312 its reverse (21320432122), we get a palindrome (43443834434).

The spelling of 22123402312 in words is "twenty-two billion, one hundred twenty-three million, four hundred two thousand, three hundred twelve".