21023441413207 has 4 divisors (see below), whose sum is σ = 21183925698936. Its totient is φ = 20862957127480.

The previous prime is 21023441413201. The next prime is 21023441413223. The reversal of 21023441413207 is 70231414432012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21023441413207 - 2³ = 21023441413199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023441413201) 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, 80242142668 + ... + 80242142929.

It is an arithmetic number, because the mean of its divisors is an integer number (5295981424734).

Almost surely, 2^{21023441413207} is an apocalyptic number.

21023441413207 is a deficient number, since it is larger than the sum of its proper divisors (160484285729).

21023441413207 is a wasteful number, since it uses less digits than its factorization.

21023441413207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160484285728.

The product of its (nonzero) digits is 32256, while the sum is 34.

Adding to 21023441413207 its reverse (70231414432012), we get a palindrome (91254855845219).

The spelling of 21023441413207 in words is "twenty-one trillion, twenty-three billion, four hundred forty-one million, four hundred thirteen thousand, two hundred seven".