21110120201 has 4 divisors (see below), whose sum is σ = 21307411152. Its totient is φ = 20912829252.

The previous prime is 21110120179. The next prime is 21110120219. The reversal of 21110120201 is 10202101112.

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 21110120201 - 2⁶ = 21110120137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110120231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98645315 + ... + 98645528.

It is an arithmetic number, because the mean of its divisors is an integer number (5326852788).

Almost surely, 2^21110120201 is an apocalyptic number.

It is an amenable number.

21110120201 is a deficient number, since it is larger than the sum of its proper divisors (197290951).

21110120201 is a wasteful number, since it uses less digits than its factorization.

21110120201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197290950.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21110120201 its reverse (10202101112), we get a palindrome (31312221313).

The spelling of 21110120201 in words is "twenty-one billion, one hundred ten million, one hundred twenty thousand, two hundred one".