21202212201 has 16 divisors (see below), whose sum is σ = 30151030464. Its totient is φ = 13206239744.

The previous prime is 21202212181. The next prime is 21202212203. The reversal of 21202212201 is 10221220212.

It is not a de Polignac number, because 21202212201 - 2⁵ = 21202212169 is a prime.

It is a super-3 number, since 3×21202212201³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21202212203) 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 15 ways as a sum of consecutive naturals, for example, 1510275 + ... + 1524248.

It is an arithmetic number, because the mean of its divisors is an integer number (1884439404).

Almost surely, 2^21202212201 is an apocalyptic number.

It is an amenable number.

21202212201 is a deficient number, since it is larger than the sum of its proper divisors (8948818263).

21202212201 is a wasteful number, since it uses less digits than its factorization.

21202212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034680.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21202212201 its reverse (10221220212), we get a palindrome (31423432413).

The spelling of 21202212201 in words is "twenty-one billion, two hundred two million, two hundred twelve thousand, two hundred one".