211333112320221 has 6 divisors (see below), whose sum is σ = 305258940018110. Its totient is φ = 140888741546808.

The previous prime is 211333112320219. The next prime is 211333112320243. The reversal of 211333112320221 is 122023211333112.

211333112320221 is a `hidden beast` number, since 2 + 1 + 1 + 3 + 3 + 3 + 112 + 320 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 168351792752025 + 42981319568196 = 12975045^2 + 6556014^2 .

It is not a de Polignac number, because 211333112320221 - 2¹ = 211333112320219 is a prime.

It is a super-2 number, since 2×211333112320221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211333112320261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11740728462226 + ... + 11740728462243.

Almost surely, 2^{211333112320221} is an apocalyptic number.

It is an amenable number.

211333112320221 is a deficient number, since it is larger than the sum of its proper divisors (93925827697889).

211333112320221 is a wasteful number, since it uses less digits than its factorization.

211333112320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23481456924475 (or 23481456924472 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 211333112320221 its reverse (122023211333112), we get a palindrome (333356323653333).

The spelling of 211333112320221 in words is "two hundred eleven trillion, three hundred thirty-three billion, one hundred twelve million, three hundred twenty thousand, two hundred twenty-one".