21110200001 has 4 divisors (see below), whose sum is σ = 23029309104. Its totient is φ = 19191090900.

The previous prime is 21110199967. The next prime is 21110200003. The reversal of 21110200001 is 10000201112.

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 a de Polignac number, because none of the positive numbers 2^k-21110200001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110200003) 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, 959554535 + ... + 959554556.

It is an arithmetic number, because the mean of its divisors is an integer number (5757327276).

Almost surely, 2^21110200001 is an apocalyptic number.

It is an amenable number.

21110200001 is a deficient number, since it is larger than the sum of its proper divisors (1919109103).

21110200001 is a wasteful number, since it uses less digits than its factorization.

21110200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919109102.

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

Adding to 21110200001 its reverse (10000201112), we get a palindrome (31110401113).

The spelling of 21110200001 in words is "twenty-one billion, one hundred ten million, two hundred thousand, one".