21442100531001 has 4 divisors (see below), whose sum is σ = 28589467374672. Its totient is φ = 14294733687332.

The previous prime is 21442100530993. The next prime is 21442100531009. The reversal of 21442100531001 is 10013500124412.

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 an interprime number because it is at equal distance from previous prime (21442100530993) and next prime (21442100531009).

It is a cyclic number.

It is not a de Polignac number, because 21442100531001 - 2³ = 21442100530993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21442100531009) 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, 3573683421831 + ... + 3573683421836.

It is an arithmetic number, because the mean of its divisors is an integer number (7147366843668).

Almost surely, 2^{21442100531001} is an apocalyptic number.

It is an amenable number.

21442100531001 is a deficient number, since it is larger than the sum of its proper divisors (7147366843671).

21442100531001 is an equidigital number, since it uses as much as digits as its factorization.

21442100531001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7147366843670.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21442100531001 its reverse (10013500124412), we get a palindrome (31455600655413).

The spelling of 21442100531001 in words is "twenty-one trillion, four hundred forty-two billion, one hundred million, five hundred thirty-one thousand, one".