12221201011212 has 36 divisors (see below), whose sum is σ = 30948956581816. Its totient is φ = 4066286253120.

The previous prime is 12221201011199. The next prime is 12221201011219. The reversal of 12221201011212 is 21211010212221.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12221201011212² (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 not an unprimeable number, because it can be changed into a prime (12221201011219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310289089 + ... + 310328472.

Almost surely, 2^{12221201011212} is an apocalyptic number.

12221201011212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221201011212 is an abundant number, since it is smaller than the sum of its proper divisors (18727755570604).

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

12221201011212 is a wasteful number, since it uses less digits than its factorization.

12221201011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620618118 (or 620618113 counting only the distinct ones).

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

Adding to 12221201011212 its reverse (21211010212221), we get a palindrome (33432211223433).

The spelling of 12221201011212 in words is "twelve trillion, two hundred twenty-one billion, two hundred one million, eleven thousand, two hundred twelve".