12001221122120 has 16 divisors (see below), whose sum is σ = 27002747524860. Its totient is φ = 4800488448832.

The previous prime is 12001221122063. The next prime is 12001221122141. The reversal of 12001221122120 is 2122112210021.

It can be written as a sum of positive squares in 2 ways, for example, as 11943258633604 + 57962488516 = 3455902^2 + 240754^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150015263987 + ... + 150015264066.

Almost surely, 2^{12001221122120} is an apocalyptic number.

12001221122120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001221122120 is an abundant number, since it is smaller than the sum of its proper divisors (15001526402740).

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

12001221122120 is a wasteful number, since it uses less digits than its factorization.

12001221122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300030528064 (or 300030528060 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12001221122120 its reverse (2122112210021), we get a palindrome (14123333332141).

The spelling of 12001221122120 in words is "twelve trillion, one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty".