211200020011221 has 8 divisors (see below), whose sum is σ = 281852130559584. Its totient is φ = 140673961401840.

The previous prime is 211200020011207. The next prime is 211200020011223. The reversal of 211200020011221 is 122110020002112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211200020011221 - 2¹⁷ = 211200019880149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211200020011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200020011223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31512980835 + ... + 31512987536.

It is an arithmetic number, because the mean of its divisors is an integer number (35231516319948).

Almost surely, 2^{211200020011221} is an apocalyptic number.

It is an amenable number.

211200020011221 is a deficient number, since it is larger than the sum of its proper divisors (70652110548363).

211200020011221 is a wasteful number, since it uses less digits than its factorization.

211200020011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63025969491.

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

Adding to 211200020011221 its reverse (122110020002112), we get a palindrome (333310040013333).

The spelling of 211200020011221 in words is "two hundred eleven trillion, two hundred billion, twenty million, eleven thousand, two hundred twenty-one".