21314221045 has 8 divisors (see below), whose sum is σ = 27544531896. Its totient is φ = 15739732416.

The previous prime is 21314221043. The next prime is 21314221081. The reversal of 21314221045 is 54012241312.

It can be written as a sum of positive squares in 4 ways, for example, as 1932569521 + 19381651524 = 43961^2 + 139218^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21314221045 - 2¹ = 21314221043 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 (21314221043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163955482 + ... + 163955611.

It is an arithmetic number, because the mean of its divisors is an integer number (3443066487).

Almost surely, 2^21314221045 is an apocalyptic number.

It is an amenable number.

21314221045 is a deficient number, since it is larger than the sum of its proper divisors (6230310851).

21314221045 is a wasteful number, since it uses less digits than its factorization.

21314221045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327911111.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21314221045 its reverse (54012241312), we get a palindrome (75326462357).

The spelling of 21314221045 in words is "twenty-one billion, three hundred fourteen million, two hundred twenty-one thousand, forty-five".