12211122401 has 4 divisors (see below), whose sum is σ = 12250898352. Its totient is φ = 12171346452.

The previous prime is 12211122397. The next prime is 12211122437. The reversal of 12211122401 is 10422111221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10422111221 = 449 ⋅23211829.

It is a cyclic number.

It is not a de Polignac number, because 12211122401 - 2² = 12211122397 is a prime.

It is a super-2 number, since 2×12211122401² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12211122401.

It is not an unprimeable number, because it can be changed into a prime (12211122101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19887515 + ... + 19888128.

It is an arithmetic number, because the mean of its divisors is an integer number (3062724588).

Almost surely, 2^12211122401 is an apocalyptic number.

It is an amenable number.

12211122401 is a deficient number, since it is larger than the sum of its proper divisors (39775951).

12211122401 is an equidigital number, since it uses as much as digits as its factorization.

12211122401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39775950.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12211122401 its reverse (10422111221), we get a palindrome (22633233622).

The spelling of 12211122401 in words is "twelve billion, two hundred eleven million, one hundred twenty-two thousand, four hundred one".