12420401165 has 8 divisors (see below), whose sum is σ = 14905081080. Its totient is φ = 9935921152.

The previous prime is 12420401101. The next prime is 12420401167. The reversal of 12420401165 is 56110402421.

It can be written as a sum of positive squares in 4 ways, for example, as 34269316 + 12386131849 = 5854^2 + 111293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12420401165 - 2⁶ = 12420401101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420401167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204881 + ... + 258489.

It is an arithmetic number, because the mean of its divisors is an integer number (1863135135).

Almost surely, 2^12420401165 is an apocalyptic number.

It is an amenable number.

12420401165 is a deficient number, since it is larger than the sum of its proper divisors (2484679915).

12420401165 is an equidigital number, since it uses as much as digits as its factorization.

12420401165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99951.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 12420401165 its reverse (56110402421), we get a palindrome (68530803586).

The spelling of 12420401165 in words is "twelve billion, four hundred twenty million, four hundred one thousand, one hundred sixty-five".