21202120222201 has 32 divisors (see below), whose sum is σ = 22620990268800. Its totient is φ = 19836725475840.

The previous prime is 21202120222193. The next prime is 21202120222223. The reversal of 21202120222201 is 10222202120212.

It is a cyclic number.

It is not a de Polignac number, because 21202120222201 - 2³ = 21202120222193 is a prime.

It is a super-2 number, since 2×21202120222201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21202120220201) 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 31 ways as a sum of consecutive naturals, for example, 651614805 + ... + 651647341.

It is an arithmetic number, because the mean of its divisors is an integer number (706905945900).

Almost surely, 2^{21202120222201} is an apocalyptic number.

It is an amenable number.

21202120222201 is a deficient number, since it is larger than the sum of its proper divisors (1418870046599).

21202120222201 is a wasteful number, since it uses less digits than its factorization.

21202120222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36729.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21202120222201 its reverse (10222202120212), we get a palindrome (31424322342413).

The spelling of 21202120222201 in words is "twenty-one trillion, two hundred two billion, one hundred twenty million, two hundred twenty-two thousand, two hundred one".