12420555510401 has 4 divisors (see below), whose sum is σ = 12421071274032. Its totient is φ = 12420039746772.

The previous prime is 12420555510373. The next prime is 12420555510437. The reversal of 12420555510401 is 10401555502421.

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.

It is a cyclic number.

It is not a de Polignac number, because 12420555510401 - 2¹⁰ = 12420555509377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12420555510481) 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, 257845691 + ... + 257893856.

It is an arithmetic number, because the mean of its divisors is an integer number (3105267818508).

Almost surely, 2^{12420555510401} is an apocalyptic number.

It is an amenable number.

12420555510401 is a deficient number, since it is larger than the sum of its proper divisors (515763631).

12420555510401 is an equidigital number, since it uses as much as digits as its factorization.

12420555510401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515763630.

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 12420555510401 in words is "twelve trillion, four hundred twenty billion, five hundred fifty-five million, five hundred ten thousand, four hundred one".