12012220222100 has 72 divisors (see below), whose sum is σ = 29791466765760. Its totient is φ = 4118315051520.

The previous prime is 12012220222033. The next prime is 12012220222159. The reversal of 12012220222100 is 122202221021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18394991 + ... + 19036809.

Almost surely, 2^{12012220222100} is an apocalyptic number.

12012220222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012220222100 is an abundant number, since it is smaller than the sum of its proper divisors (17779246543660).

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

12012220222100 is a wasteful number, since it uses less digits than its factorization.

12012220222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668577 (or 668570 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12012220222100 its reverse (122202221021), we get a palindrome (12134422443121).

The spelling of 12012220222100 in words is "twelve trillion, twelve billion, two hundred twenty million, two hundred twenty-two thousand, one hundred".