12222122004 has 36 divisors (see below), whose sum is σ = 30904473600. Its totient is φ = 4072766160.

The previous prime is 12222121999. The next prime is 12222122021. The reversal of 12222122004 is 40022122221.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67309 + ... + 170219.

It is an arithmetic number, because the mean of its divisors is an integer number (858457600).

Almost surely, 2^12222122004 is an apocalyptic number.

It is an amenable number.

12222122004 is an abundant number, since it is smaller than the sum of its proper divisors (18682351596).

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

12222122004 is a wasteful number, since it uses less digits than its factorization.

12222122004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106220 (or 106215 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12222122004 its reverse (40022122221), we get a palindrome (52244244225).

The spelling of 12222122004 in words is "twelve billion, two hundred twenty-two million, one hundred twenty-two thousand, four".