211002100221 has 16 divisors (see below), whose sum is σ = 306927040320. Its totient is φ = 127873854720.

The previous prime is 211002100213. The next prime is 211002100223. The reversal of 211002100221 is 122001200112.

It is not a de Polignac number, because 211002100221 - 2³ = 211002100213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211002100197 and 211002100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211002100223) 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, 588315 + ... + 876423.

It is an arithmetic number, because the mean of its divisors is an integer number (19182940020).

Almost surely, 2^211002100221 is an apocalyptic number.

It is an amenable number.

211002100221 is a deficient number, since it is larger than the sum of its proper divisors (95924940099).

211002100221 is a wasteful number, since it uses less digits than its factorization.

211002100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310316.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211002100221 its reverse (122001200112), we get a palindrome (333003300333).

The spelling of 211002100221 in words is "two hundred eleven billion, two million, one hundred thousand, two hundred twenty-one".