21120120222201 has 48 divisors (see below), whose sum is σ = 40960233175680. Its totient is φ = 10127530172160.

The previous prime is 21120120222163. The next prime is 21120120222203. The reversal of 21120120222201 is 10222202102112.

It is a happy number.

21120120222201 is a `hidden beast` number, since 2 + 1 + 120 + 120 + 222 + 201 = 666.

It is not a de Polignac number, because 21120120222201 - 2⁶ = 21120120222137 is a prime.

It is a super-2 number, since 2×21120120222201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21120120222203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1172158836 + ... + 1172176853.

It is an arithmetic number, because the mean of its divisors is an integer number (853338191160).

Almost surely, 2^{21120120222201} is an apocalyptic number.

21120120222201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21120120222201 is a deficient number, since it is larger than the sum of its proper divisors (19840112953479).

21120120222201 is a wasteful number, since it uses less digits than its factorization.

21120120222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344335726 (or 2344335723 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21120120222201 its reverse (10222202102112), we get a palindrome (31342322324313).

It can be divided in two parts, 211201 and 20222201, that added together give a palindrome (20433402).

The spelling of 21120120222201 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty million, two hundred twenty-two thousand, two hundred one".