12420201511 has 4 divisors (see below), whose sum is σ = 12421395000. Its totient is φ = 12419008024.

The previous prime is 12420201509. The next prime is 12420201517. The reversal of 12420201511 is 11510202421.

12420201511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12420201511 - 2¹ = 12420201509 is a prime.

It is a super-2 number, since 2×12420201511² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420201517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580996 + ... + 601993.

It is an arithmetic number, because the mean of its divisors is an integer number (3105348750).

Almost surely, 2^12420201511 is an apocalyptic number.

12420201511 is a deficient number, since it is larger than the sum of its proper divisors (1193489).

12420201511 is a wasteful number, since it uses less digits than its factorization.

12420201511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193488.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 12420201511 its reverse (11510202421), we get a palindrome (23930403932).

The spelling of 12420201511 in words is "twelve billion, four hundred twenty million, two hundred one thousand, five hundred eleven".