211002201221 has 16 divisors (see below), whose sum is σ = 244890663168. Its totient is φ = 178071264000.

The previous prime is 211002201197. The next prime is 211002201257. The reversal of 211002201221 is 122102200112.

It is a de Polignac number, because none of the positive numbers 2^k-211002201221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211002201196 and 211002201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211002201271) 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, 763850 + ... + 1002731.

It is an arithmetic number, because the mean of its divisors is an integer number (15305666448).

Almost surely, 2^211002201221 is an apocalyptic number.

It is an amenable number.

211002201221 is a deficient number, since it is larger than the sum of its proper divisors (33888461947).

211002201221 is a wasteful number, since it uses less digits than its factorization.

211002201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766852.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211002201221 its reverse (122102200112), we get a palindrome (333104401333).

The spelling of 211002201221 in words is "two hundred eleven billion, two million, two hundred one thousand, two hundred twenty-one".