21120120201 has 16 divisors (see below), whose sum is σ = 28921014720. Its totient is φ = 13704379200.

The previous prime is 21120120163. The next prime is 21120120223. The reversal of 21120120201 is 10202102112.

It is not a de Polignac number, because 21120120201 - 2⁶ = 21120120137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120120251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572830 + ... + 608583.

It is an arithmetic number, because the mean of its divisors is an integer number (1807563420).

Almost surely, 2^21120120201 is an apocalyptic number.

It is an amenable number.

21120120201 is a deficient number, since it is larger than the sum of its proper divisors (7800894519).

21120120201 is a wasteful number, since it uses less digits than its factorization.

21120120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181576.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21120120201 its reverse (10202102112), we get a palindrome (31322222313).

The spelling of 21120120201 in words is "twenty-one billion, one hundred twenty million, one hundred twenty thousand, two hundred one".