21201444001123 has 2 divisors, whose sum is σ = 21201444001124. Its totient is φ = 21201444001122.

The previous prime is 21201444001099. The next prime is 21201444001181. The reversal of 21201444001123 is 32110044410212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21201444001123 - 2¹³ = 21201443992931 is a prime.

It is a super-2 number, since 2×21201444001123² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21201444001183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600722000561 + 10600722000562.

It is an arithmetic number, because the mean of its divisors is an integer number (10600722000562).

Almost surely, 2^{21201444001123} is an apocalyptic number.

21201444001123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201444001123 is an equidigital number, since it uses as much as digits as its factorization.

21201444001123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21201444001123 its reverse (32110044410212), we get a palindrome (53311488411335).

The spelling of 21201444001123 in words is "twenty-one trillion, two hundred one billion, four hundred forty-four million, one thousand, one hundred twenty-three".