211320332231 has 4 divisors (see below), whose sum is σ = 222442455000. Its totient is φ = 200198209464.

The previous prime is 211320332221. The next prime is 211320332291. The reversal of 211320332231 is 132233023112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211320332231 is a prime.

It is a super-2 number, since 2×211320332231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211320332197 and 211320332206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211320332221) 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, 5561061356 + ... + 5561061393.

It is an arithmetic number, because the mean of its divisors is an integer number (55610613750).

Almost surely, 2^211320332231 is an apocalyptic number.

211320332231 is a deficient number, since it is larger than the sum of its proper divisors (11122122769).

211320332231 is a wasteful number, since it uses less digits than its factorization.

211320332231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122122768.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 211320332231 its reverse (132233023112), we get a palindrome (343553355343).

The spelling of 211320332231 in words is "two hundred eleven billion, three hundred twenty million, three hundred thirty-two thousand, two hundred thirty-one".