211102100020221 has 4 divisors (see below), whose sum is σ = 281469466693632. Its totient is φ = 140734733346812.

The previous prime is 211102100020181. The next prime is 211102100020243. The reversal of 211102100020221 is 122020001201112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211102100020221 - 2²⁷ = 211101965802493 is a prime.

It is a super-2 number, since 2×211102100020221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211102100020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211102100020121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35183683336701 + ... + 35183683336706.

It is an arithmetic number, because the mean of its divisors is an integer number (70367366673408).

Almost surely, 2^{211102100020221} is an apocalyptic number.

It is an amenable number.

211102100020221 is a deficient number, since it is larger than the sum of its proper divisors (70367366673411).

211102100020221 is an equidigital number, since it uses as much as digits as its factorization.

211102100020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70367366673410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211102100020221 its reverse (122020001201112), we get a palindrome (333122101221333).

The spelling of 211102100020221 in words is "two hundred eleven trillion, one hundred two billion, one hundred million, twenty thousand, two hundred twenty-one".