210001313221 has 16 divisors (see below), whose sum is σ = 240387840000. Its totient is φ = 179711560368.

The previous prime is 210001313183. The next prime is 210001313227. The reversal of 210001313221 is 122313100012.

It is a cyclic number.

It is not a de Polignac number, because 210001313221 - 2⁹ = 210001312709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210001313195 and 210001313204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001313227) 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, 17607166 + ... + 17619088.

It is an arithmetic number, because the mean of its divisors is an integer number (15024240000).

Almost surely, 2^210001313221 is an apocalyptic number.

It is an amenable number.

210001313221 is a deficient number, since it is larger than the sum of its proper divisors (30386526779).

210001313221 is a wasteful number, since it uses less digits than its factorization.

210001313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15768.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 210001313221 its reverse (122313100012), we get a palindrome (332314413233).

The spelling of 210001313221 in words is "two hundred ten billion, one million, three hundred thirteen thousand, two hundred twenty-one".