12222001000 has 64 divisors (see below), whose sum is σ = 31199463360. Its totient is φ = 4444360000.

The previous prime is 12222000991. The next prime is 12222001003. The reversal of 12222001000 is 10022221.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (12222001003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544546 + ... + 566545.

It is an arithmetic number, because the mean of its divisors is an integer number (487491615).

Almost surely, 2^12222001000 is an apocalyptic number.

12222001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222001000 is an abundant number, since it is smaller than the sum of its proper divisors (18977462360).

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

12222001000 is a wasteful number, since it uses less digits than its factorization.

12222001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111123 (or 1111109 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 12222001000 its reverse (10022221), we get a palindrome (12232023221).

The spelling of 12222001000 in words is "twelve billion, two hundred twenty-two million, one thousand".