211320223231 has 8 divisors (see below), whose sum is σ = 229025153504. Its totient is φ = 193822368480.

The previous prime is 211320223229. The next prime is 211320223243. The reversal of 211320223231 is 132322023112.

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

It is not a de Polignac number, because 211320223231 - 2¹ = 211320223229 is a prime.

It is a super-2 number, since 2×211320223231² (a number of 23 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 (211320227231) 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, 51766755 + ... + 51770836.

It is an arithmetic number, because the mean of its divisors is an integer number (28628144188).

Almost surely, 2^211320223231 is an apocalyptic number.

211320223231 is a deficient number, since it is larger than the sum of its proper divisors (17704930273).

211320223231 is a wasteful number, since it uses less digits than its factorization.

211320223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103537761.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 211320223231 its reverse (132322023112), we get a palindrome (343642246343).

The spelling of 211320223231 in words is "two hundred eleven billion, three hundred twenty million, two hundred twenty-three thousand, two hundred thirty-one".