21230442033401 has 4 divisors (see below), whose sum is σ = 21230491550592. Its totient is φ = 21230392516212.

The previous prime is 21230442033371. The next prime is 21230442033433. The reversal of 21230442033401 is 10433024403212.

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 21230442033401 - 2¹⁴ = 21230442017017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230442033491) 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, 24109805 + ... + 24974858.

It is an arithmetic number, because the mean of its divisors is an integer number (5307622887648).

Almost surely, 2^{21230442033401} is an apocalyptic number.

It is an amenable number.

21230442033401 is a deficient number, since it is larger than the sum of its proper divisors (49517191).

21230442033401 is an equidigital number, since it uses as much as digits as its factorization.

21230442033401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49517190.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 21230442033401 its reverse (10433024403212), we get a palindrome (31663466436613).

The spelling of 21230442033401 in words is "twenty-one trillion, two hundred thirty billion, four hundred forty-two million, thirty-three thousand, four hundred one".