12001222121022 has 96 divisors (see below), whose sum is σ = 27091534579200. Its totient is φ = 3981757082688.

The previous prime is 12001222121011. The next prime is 12001222121027. The reversal of 12001222121022 is 22012122210021.

It is a happy number.

12001222121022 is a `hidden beast` number, since 1 + 200 + 12 + 221 + 210 + 22 = 666.

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 = 12001222120986 and 12001222121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001222121027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 253075858 + ... + 253123274.

It is an arithmetic number, because the mean of its divisors is an integer number (282203485200).

Almost surely, 2^{12001222121022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12001222121022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13545767289600).

12001222121022 is an abundant number, since it is smaller than the sum of its proper divisors (15090312458178).

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

12001222121022 is a wasteful number, since it uses less digits than its factorization.

12001222121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49852 (or 49840 counting only the distinct ones).

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

Adding to 12001222121022 its reverse (22012122210021), we get a palindrome (34013344331043).

The spelling of 12001222121022 in words is "twelve trillion, one billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty-two".