12211212222000 has 480 divisors, whose sum is σ = 47516909865984. Its totient is φ = 2897306688000.

The previous prime is 12211212221933. The next prime is 12211212222113. The reversal of 12211212222000 is 22221211221.

It is a happy number.

12211212222000 is a `hidden beast` number, since 1 + 221 + 1 + 21 + 222 + 200 + 0 = 666.

It is a super-2 number, since 2×12211212222000² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8649907 + ... + 9962093.

Almost surely, 2^{12211212222000} is an apocalyptic number.

12211212222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12211212222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23758454932992).

12211212222000 is an abundant number, since it is smaller than the sum of its proper divisors (35305697643984).

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

12211212222000 is a wasteful number, since it uses less digits than its factorization.

12211212222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312274 (or 1312255 counting only the distinct ones).

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

Adding to 12211212222000 its reverse (22221211221), we get a palindrome (12233433433221).

The spelling of 12211212222000 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty-two thousand".