21120144301 has 4 divisors (see below), whose sum is σ = 21122744832. Its totient is φ = 21117543772.

The previous prime is 21120144299. The next prime is 21120144313. The reversal of 21120144301 is 10344102112.

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 21120144301 - 2¹ = 21120144299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120144401) 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, 1288045 + ... + 1304338.

It is an arithmetic number, because the mean of its divisors is an integer number (5280686208).

Almost surely, 2^21120144301 is an apocalyptic number.

It is an amenable number.

21120144301 is a deficient number, since it is larger than the sum of its proper divisors (2600531).

21120144301 is an equidigital number, since it uses as much as digits as its factorization.

21120144301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600530.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21120144301 its reverse (10344102112), we get a palindrome (31464246413).

The spelling of 21120144301 in words is "twenty-one billion, one hundred twenty million, one hundred forty-four thousand, three hundred one".