211020102221 has 16 divisors (see below), whose sum is σ = 219785218560. Its totient is φ = 202356665280.

The previous prime is 211020102203. The next prime is 211020102257. The reversal of 211020102221 is 122201020112.

It is a cyclic number.

It is not a de Polignac number, because 211020102221 - 2²² = 211015907917 is a prime.

It is a super-3 number, since 3×211020102221³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 211020102196 and 211020102205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020102521) 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, 4950626 + ... + 4993068.

It is an arithmetic number, because the mean of its divisors is an integer number (13736576160).

Almost surely, 2^211020102221 is an apocalyptic number.

It is an amenable number.

211020102221 is a deficient number, since it is larger than the sum of its proper divisors (8765116339).

211020102221 is a wasteful number, since it uses less digits than its factorization.

211020102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43636.

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

Adding to 211020102221 its reverse (122201020112), we get a palindrome (333221122333).

The spelling of 211020102221 in words is "two hundred eleven billion, twenty million, one hundred two thousand, two hundred twenty-one".