21030310201 has 4 divisors (see below), whose sum is σ = 21030644304. Its totient is φ = 21029976100.

The previous prime is 21030310181. The next prime is 21030310211. The reversal of 21030310201 is 10201303012.

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 21030310201 - 2¹⁹ = 21029785913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030310211) 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, 40855 + ... + 209116.

It is an arithmetic number, because the mean of its divisors is an integer number (5257661076).

Almost surely, 2^21030310201 is an apocalyptic number.

It is an amenable number.

21030310201 is a deficient number, since it is larger than the sum of its proper divisors (334103).

21030310201 is an equidigital number, since it uses as much as digits as its factorization.

21030310201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334102.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21030310201 its reverse (10201303012), we get a palindrome (31231613213).

The spelling of 21030310201 in words is "twenty-one billion, thirty million, three hundred ten thousand, two hundred one".