21414431334021 has 32 divisors (see below), whose sum is σ = 33871879859328. Its totient is φ = 11884870103040.

The previous prime is 21414431334017. The next prime is 21414431334053. The reversal of 21414431334021 is 12043313441412.

It is a happy number.

It is not a de Polignac number, because 21414431334021 - 2² = 21414431334017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414431334071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 515815620 + ... + 515857133.

It is an arithmetic number, because the mean of its divisors is an integer number (1058496245604).

Almost surely, 2^{21414431334021} is an apocalyptic number.

It is an amenable number.

21414431334021 is a deficient number, since it is larger than the sum of its proper divisors (12457448525307).

21414431334021 is a wasteful number, since it uses less digits than its factorization.

21414431334021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031672821.

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 21414431334021 its reverse (12043313441412), we get a palindrome (33457744775433).

The spelling of 21414431334021 in words is "twenty-one trillion, four hundred fourteen billion, four hundred thirty-one million, three hundred thirty-four thousand, twenty-one".