21000110201 has 4 divisors (see below), whose sum is σ = 24000125952. Its totient is φ = 18000094452.

The previous prime is 21000110177. The next prime is 21000110203. The reversal of 21000110201 is 10201100012.

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 21000110201 - 2⁶ = 21000110137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000110203) 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, 1500007865 + ... + 1500007878.

It is an arithmetic number, because the mean of its divisors is an integer number (6000031488).

Almost surely, 2^21000110201 is an apocalyptic number.

It is an amenable number.

21000110201 is a deficient number, since it is larger than the sum of its proper divisors (3000015751).

21000110201 is an equidigital number, since it uses as much as digits as its factorization.

21000110201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000015750.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21000110201 its reverse (10201100012), we get a palindrome (31201210213).

The spelling of 21000110201 in words is "twenty-one billion, one hundred ten thousand, two hundred one".