12211215201 has 6 divisors (see below), whose sum is σ = 17638421970. Its totient is φ = 8140810128.

The previous prime is 12211215199. The next prime is 12211215229. The reversal of 12211215201 is 10251211221.

12211215201 is a `hidden beast` number, since 1 + 2 + 21 + 121 + 520 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12059334225 + 151880976 = 109815^2 + 12324^2 .

It is not a de Polignac number, because 12211215201 - 2¹ = 12211215199 is a prime.

It is a super-2 number, since 2×12211215201² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12211215251) 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 5 ways as a sum of consecutive naturals, for example, 678400836 + ... + 678400853.

It is an arithmetic number, because the mean of its divisors is an integer number (2939736995).

Almost surely, 2^12211215201 is an apocalyptic number.

It is an amenable number.

12211215201 is a deficient number, since it is larger than the sum of its proper divisors (5427206769).

12211215201 is a wasteful number, since it uses less digits than its factorization.

12211215201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356801695 (or 1356801692 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 12211215201 its reverse (10251211221), we get a palindrome (22462426422).

The spelling of 12211215201 in words is "twelve billion, two hundred eleven million, two hundred fifteen thousand, two hundred one".