21422142415321 has 4 divisors (see below), whose sum is σ = 21468410541952. Its totient is φ = 21375874288692.

The previous prime is 21422142415313. The next prime is 21422142415381. The reversal of 21422142415321 is 12351424122412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21422142415321 - 2³ = 21422142415313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21422142415301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23134062621 + ... + 23134063546.

It is an arithmetic number, because the mean of its divisors is an integer number (5367102635488).

Almost surely, 2^{21422142415321} is an apocalyptic number.

It is an amenable number.

21422142415321 is a deficient number, since it is larger than the sum of its proper divisors (46268126631).

21422142415321 is an equidigital number, since it uses as much as digits as its factorization.

21422142415321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46268126630.

The product of its digits is 30720, while the sum is 34.

Adding to 21422142415321 its reverse (12351424122412), we get a palindrome (33773566537733).

The spelling of 21422142415321 in words is "twenty-one trillion, four hundred twenty-two billion, one hundred forty-two million, four hundred fifteen thousand, three hundred twenty-one".