12001122120 has 128 divisors (see below), whose sum is σ = 41053703040. Its totient is φ = 2780344320.

The previous prime is 12001122097. The next prime is 12001122143. The reversal of 12001122120 is 2122110021.

It is an interprime number because it is at equal distance from previous prime (12001122097) and next prime (12001122143).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12001122096 and 12001122105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199746 + ... + 252785.

It is an arithmetic number, because the mean of its divisors is an integer number (320732055).

Almost surely, 2^12001122120 is an apocalyptic number.

12001122120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001122120 is an abundant number, since it is smaller than the sum of its proper divisors (29052580920).

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

12001122120 is a wasteful number, since it uses less digits than its factorization.

12001122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452575 (or 452571 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12001122120 its reverse (2122110021), we get a palindrome (14123232141).

The spelling of 12001122120 in words is "twelve billion, one million, one hundred twenty-two thousand, one hundred twenty".