12211122001212 has 72 divisors (see below), whose sum is σ = 31621714640880. Its totient is φ = 3970863233280.

The previous prime is 12211122001151. The next prime is 12211122001277. The reversal of 12211122001212 is 21210022111221.

12211122001212 is a `hidden beast` number, since 1 + 221 + 11 + 220 + 0 + 1 + 212 = 666.

It is a super-2 number, since 2×12211122001212² (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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25830438 + ... + 26298930.

Almost surely, 2^{12211122001212} is an apocalyptic number.

12211122001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12211122001212 is an abundant number, since it is smaller than the sum of its proper divisors (19410592639668).

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

12211122001212 is a wasteful number, since it uses less digits than its factorization.

12211122001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486203 (or 486198 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12211122001212 its reverse (21210022111221), we get a palindrome (33421144112433).

The spelling of 12211122001212 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-two million, one thousand, two hundred twelve".