210201121220221 has 16 divisors (see below), whose sum is σ = 213594333220800. Its totient is φ = 206833182886528.

The previous prime is 210201121220179. The next prime is 210201121220281. The reversal of 210201121220221 is 122022121102012.

It is a cyclic number.

It is not a de Polignac number, because 210201121220221 - 2³⁷ = 210063682266749 is a prime.

It is a super-2 number, since 2×210201121220221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210201121220281) 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, 9033426 + ... + 22405468.

It is an arithmetic number, because the mean of its divisors is an integer number (13349645826300).

Almost surely, 2^{210201121220221} is an apocalyptic number.

It is an amenable number.

210201121220221 is a deficient number, since it is larger than the sum of its proper divisors (3393212000579).

210201121220221 is a wasteful number, since it uses less digits than its factorization.

210201121220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13372988.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210201121220221 its reverse (122022121102012), we get a palindrome (332223242322233).

The spelling of 210201121220221 in words is "two hundred ten trillion, two hundred one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".