21414221331 has 4 divisors (see below), whose sum is σ = 28552295112. Its totient is φ = 14276147552.

The previous prime is 21414221329. The next prime is 21414221363. The reversal of 21414221331 is 13312241412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21414221331 - 2¹ = 21414221329 is a prime.

It is a super-2 number, since 2×21414221331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21414222331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3569036886 + ... + 3569036891.

It is an arithmetic number, because the mean of its divisors is an integer number (7138073778).

Almost surely, 2^21414221331 is an apocalyptic number.

21414221331 is a deficient number, since it is larger than the sum of its proper divisors (7138073781).

21414221331 is an equidigital number, since it uses as much as digits as its factorization.

21414221331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138073780.

The product of its digits is 1152, while the sum is 24.

Adding to 21414221331 its reverse (13312241412), we get a palindrome (34726462743).

The spelling of 21414221331 in words is "twenty-one billion, four hundred fourteen million, two hundred twenty-one thousand, three hundred thirty-one".