21412225205 has 16 divisors (see below), whose sum is σ = 29409003264. Its totient is φ = 14660835840.

The previous prime is 21412225151. The next prime is 21412225207. The reversal of 21412225205 is 50252221412.

It is not a de Polignac number, because 21412225205 - 2¹⁶ = 21412159669 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 (21412225207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430961 + ... + 478070.

It is an arithmetic number, because the mean of its divisors is an integer number (1838062704).

Almost surely, 2^21412225205 is an apocalyptic number.

It is an amenable number.

21412225205 is a deficient number, since it is larger than the sum of its proper divisors (7996778059).

21412225205 is an equidigital number, since it uses as much as digits as its factorization.

21412225205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909716.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 21412225205 its reverse (50252221412), we get a palindrome (71664446617).

The spelling of 21412225205 in words is "twenty-one billion, four hundred twelve million, two hundred twenty-five thousand, two hundred five".