211120020221 has 4 divisors (see below), whose sum is σ = 230312749344. Its totient is φ = 191927291100.

The previous prime is 211120020217. The next prime is 211120020239. The reversal of 211120020221 is 122020021112.

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 211120020221 - 2² = 211120020217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211120020196 and 211120020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211120010221) 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, 9596364545 + ... + 9596364566.

It is an arithmetic number, because the mean of its divisors is an integer number (57578187336).

Almost surely, 2^211120020221 is an apocalyptic number.

It is an amenable number.

211120020221 is a deficient number, since it is larger than the sum of its proper divisors (19192729123).

211120020221 is a wasteful number, since it uses less digits than its factorization.

211120020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19192729122.

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

Adding to 211120020221 its reverse (122020021112), we get a palindrome (333140041333).

The spelling of 211120020221 in words is "two hundred eleven billion, one hundred twenty million, twenty thousand, two hundred twenty-one".