211121200221 has 8 divisors (see below), whose sum is σ = 281497222464. Its totient is φ = 140746322400.

The previous prime is 211121200217. The next prime is 211121200253. The reversal of 211121200221 is 122002121112.

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

It is not a de Polignac number, because 211121200221 - 2² = 211121200217 is a prime.

It is a super-2 number, since 2×211121200221² (a number of 23 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 211121200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121200211) 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, 340225 + ... + 733481.

It is an arithmetic number, because the mean of its divisors is an integer number (35187152808).

Almost surely, 2^211121200221 is an apocalyptic number.

It is an amenable number.

211121200221 is a deficient number, since it is larger than the sum of its proper divisors (70376022243).

211121200221 is a wasteful number, since it uses less digits than its factorization.

211121200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572211.

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

Adding to 211121200221 its reverse (122002121112), we get a palindrome (333123321333).

The spelling of 211121200221 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred thousand, two hundred twenty-one".