211021200212221 has 8 divisors (see below), whose sum is σ = 241177739806080. Its totient is φ = 180867324080688.

The previous prime is 211021200212209. The next prime is 211021200212237. The reversal of 211021200212221 is 122212002120112.

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

It is not a de Polignac number, because 211021200212221 - 2⁷ = 211021200212093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021200212321) 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, 665695801 + ... + 666012718.

It is an arithmetic number, because the mean of its divisors is an integer number (30147217475760).

Almost surely, 2^{211021200212221} is an apocalyptic number.

It is an amenable number.

211021200212221 is a deficient number, since it is larger than the sum of its proper divisors (30156539593859).

211021200212221 is a wasteful number, since it uses less digits than its factorization.

211021200212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331731163.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211021200212221 its reverse (122212002120112), we get a palindrome (333233202332333).

The spelling of 211021200212221 in words is "two hundred eleven trillion, twenty-one billion, two hundred million, two hundred twelve thousand, two hundred twenty-one".