21142424422001 has 4 divisors (see below), whose sum is σ = 21151237440000. Its totient is φ = 21133611404004.

The previous prime is 21142424421929. The next prime is 21142424422003. The reversal of 21142424422001 is 10022442424112.

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 21142424422001 - 2²⁶ = 21142357313137 is a prime.

It is a super-2 number, since 2×21142424422001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21142424422003) 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, 4406505401 + ... + 4406510198.

It is an arithmetic number, because the mean of its divisors is an integer number (5287809360000).

Almost surely, 2^{21142424422001} is an apocalyptic number.

It is an amenable number.

21142424422001 is a deficient number, since it is larger than the sum of its proper divisors (8813017999).

21142424422001 is an equidigital number, since it uses as much as digits as its factorization.

21142424422001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8813017998.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 21142424422001 its reverse (10022442424112), we get a palindrome (31164866846113).

The spelling of 21142424422001 in words is "twenty-one trillion, one hundred forty-two billion, four hundred twenty-four million, four hundred twenty-two thousand, one".