21120013201 has 16 divisors (see below), whose sum is σ = 24876910080. Its totient is φ = 17555123520.

The previous prime is 21120013127. The next prime is 21120013241. The reversal of 21120013201 is 10231002112.

It is a cyclic number.

It is not a de Polignac number, because 21120013201 - 2⁹ = 21120012689 is a prime.

It is a super-2 number, since 2×21120013201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120013241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258610 + ... + 330331.

It is an arithmetic number, because the mean of its divisors is an integer number (1554806880).

Almost surely, 2^21120013201 is an apocalyptic number.

It is an amenable number.

21120013201 is a deficient number, since it is larger than the sum of its proper divisors (3756896879).

21120013201 is a wasteful number, since it uses less digits than its factorization.

21120013201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589104.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21120013201 its reverse (10231002112), we get a palindrome (31351015313).

The spelling of 21120013201 in words is "twenty-one billion, one hundred twenty million, thirteen thousand, two hundred one".