21210003675007 has 4 divisors (see below), whose sum is σ = 24240004200016. Its totient is φ = 18180003150000.

The previous prime is 21210003674999. The next prime is 21210003675023. The reversal of 21210003675007 is 70057630001212.

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 21210003675007 - 2³ = 21210003674999 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 (21210003675607) 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, 1515000262494 + ... + 1515000262507.

It is an arithmetic number, because the mean of its divisors is an integer number (6060001050004).

Almost surely, 2^{21210003675007} is an apocalyptic number.

21210003675007 is a deficient number, since it is larger than the sum of its proper divisors (3030000525009).

21210003675007 is an equidigital number, since it uses as much as digits as its factorization.

21210003675007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030000525008.

The product of its (nonzero) digits is 17640, while the sum is 34.

Adding to 21210003675007 its reverse (70057630001212), we get a palindrome (91267633676219).

The spelling of 21210003675007 in words is "twenty-one trillion, two hundred ten billion, three million, six hundred seventy-five thousand, seven".