12002221012122 has 24 divisors (see below), whose sum is σ = 28368886029120. Its totient is φ = 3637036670280.

The previous prime is 12002221012099. The next prime is 12002221012127. The reversal of 12002221012122 is 22121012220021.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12002221012095 and 12002221012104.

It is not an unprimeable number, because it can be changed into a prime (12002221012127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30308638722 + ... + 30308639117.

It is an arithmetic number, because the mean of its divisors is an integer number (1182036917880).

Almost surely, 2^{12002221012122} is an apocalyptic number.

12002221012122 is an abundant number, since it is smaller than the sum of its proper divisors (16366665016998).

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

12002221012122 is a wasteful number, since it uses less digits than its factorization.

12002221012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60617277858 (or 60617277855 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12002221012122 its reverse (22121012220021), we get a palindrome (34123233232143).

The spelling of 12002221012122 in words is "twelve trillion, two billion, two hundred twenty-one million, twelve thousand, one hundred twenty-two".