12420220211 has 4 divisors (see below), whose sum is σ = 14194537392. Its totient is φ = 10645903032.

The previous prime is 12420220193. The next prime is 12420220229. The reversal of 12420220211 is 11202202421.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12420220193) and next prime (12420220229).

It is a cyclic number.

It is not a de Polignac number, because 12420220211 - 2¹⁴ = 12420203827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12420220211.

It is not an unprimeable number, because it can be changed into a prime (12420228211) 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, 887158580 + ... + 887158593.

It is an arithmetic number, because the mean of its divisors is an integer number (3548634348).

Almost surely, 2^12420220211 is an apocalyptic number.

12420220211 is a deficient number, since it is larger than the sum of its proper divisors (1774317181).

12420220211 is an equidigital number, since it uses as much as digits as its factorization.

12420220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774317180.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12420220211 its reverse (11202202421), we get a palindrome (23622422632).

The spelling of 12420220211 in words is "twelve billion, four hundred twenty million, two hundred twenty thousand, two hundred eleven".