14420106721 has 4 divisors (see below), whose sum is σ = 14422173444. Its totient is φ = 14418040000.

The previous prime is 14420106697. The next prime is 14420106793. The reversal of 14420106721 is 12760102441.

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 1973580625 + 12446526096 = 44425^2 + 111564^2 .

It is a cyclic number.

It is not a de Polignac number, because 14420106721 - 2⁹ = 14420106209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14420106721.

It is not an unprimeable number, because it can be changed into a prime (14420106821) 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, 1022860 + ... + 1036861.

It is an arithmetic number, because the mean of its divisors is an integer number (3605543361).

Almost surely, 2^14420106721 is an apocalyptic number.

It is an amenable number.

14420106721 is a deficient number, since it is larger than the sum of its proper divisors (2066723).

14420106721 is an equidigital number, since it uses as much as digits as its factorization.

14420106721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066722.

The product of its (nonzero) digits is 2688, while the sum is 28.

The spelling of 14420106721 in words is "fourteen billion, four hundred twenty million, one hundred six thousand, seven hundred twenty-one".