21228464342901 has 16 divisors (see below), whose sum is σ = 28417729374720. Its totient is φ = 14095755798000.

The previous prime is 21228464342879. The next prime is 21228464343043. The reversal of 21228464342901 is 10924346482212.

It is not a de Polignac number, because 21228464342901 - 2¹³ = 21228464334709 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21228464342201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107627910 + ... + 107824968.

It is an arithmetic number, because the mean of its divisors is an integer number (1776108085920).

Almost surely, 2^{21228464342901} is an apocalyptic number.

It is an amenable number.

21228464342901 is a deficient number, since it is larger than the sum of its proper divisors (7189265031819).

21228464342901 is a wasteful number, since it uses less digits than its factorization.

21228464342901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340376.

The product of its (nonzero) digits is 1327104, while the sum is 48.

The spelling of 21228464342901 in words is "twenty-one trillion, two hundred twenty-eight billion, four hundred sixty-four million, three hundred forty-two thousand, nine hundred one".