211320331123231 has 8 divisors (see below), whose sum is σ = 230533040260224. Its totient is φ = 192107916976920.

The previous prime is 211320331123217. The next prime is 211320331123247. The reversal of 211320331123231 is 132321133023112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211320331123231 is a prime.

It is a super-2 number, since 2×211320331123231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211320331123231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211320331123211) 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, 72248491 + ... + 75116476.

It is an arithmetic number, because the mean of its divisors is an integer number (28816630032528).

Almost surely, 2^{211320331123231} is an apocalyptic number.

211320331123231 is a deficient number, since it is larger than the sum of its proper divisors (19212709136993).

211320331123231 is a wasteful number, since it uses less digits than its factorization.

211320331123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147495341.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 211320331123231 its reverse (132321133023112), we get a palindrome (343641464146343).

The spelling of 211320331123231 in words is "two hundred eleven trillion, three hundred twenty billion, three hundred thirty-one million, one hundred twenty-three thousand, two hundred thirty-one".