10120421011405 has 4 divisors (see below), whose sum is σ = 12144505213692. Its totient is φ = 8096336809120.

The previous prime is 10120421011397. The next prime is 10120421011423. The reversal of 10120421011405 is 50411012402101.

It is a happy number.

10120421011405 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 can be written as a sum of positive squares in 2 ways, for example, as 7305981949764 + 2814439061641 = 2702958^2 + 1677629^2 .

It is not a de Polignac number, because 10120421011405 - 2³ = 10120421011397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1012042101136 + ... + 1012042101145.

It is an arithmetic number, because the mean of its divisors is an integer number (3036126303423).

Almost surely, 2^{10120421011405} is an apocalyptic number.

It is an amenable number.

10120421011405 is a deficient number, since it is larger than the sum of its proper divisors (2024084202287).

10120421011405 is an equidigital number, since it uses as much as digits as its factorization.

10120421011405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024084202286.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 10120421011405 its reverse (50411012402101), we get a palindrome (60531433413506).

The spelling of 10120421011405 in words is "ten trillion, one hundred twenty billion, four hundred twenty-one million, eleven thousand, four hundred five".