12420402111 has 32 divisors (see below), whose sum is σ = 20095165440. Its totient is φ = 7535656800.

The previous prime is 12420402107. The next prime is 12420402121. The reversal of 12420402111 is 11120402421.

It is not a de Polignac number, because 12420402111 - 2² = 12420402107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420402121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224275 + ... + 274116.

It is an arithmetic number, because the mean of its divisors is an integer number (627973920).

Almost surely, 2^12420402111 is an apocalyptic number.

12420402111 is a deficient number, since it is larger than the sum of its proper divisors (7674763329).

12420402111 is a wasteful number, since it uses less digits than its factorization.

12420402111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498484 (or 498478 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12420402111 its reverse (11120402421), we get a palindrome (23540804532).

The spelling of 12420402111 in words is "twelve billion, four hundred twenty million, four hundred two thousand, one hundred eleven".