211231131233 has 8 divisors (see below), whose sum is σ = 214238386440. Its totient is φ = 208237962240.

The previous prime is 211231131211. The next prime is 211231131337. The reversal of 211231131233 is 332131132112.

It can be written as a sum of positive squares in 4 ways, for example, as 34858010209 + 176373121024 = 186703^2 + 419968^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211231131233 - 2¹⁸ = 211230869089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211231131199 and 211231131208.

It is not an unprimeable number, because it can be changed into a prime (211231131733) 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, 3491348 + ... + 3551333.

It is an arithmetic number, because the mean of its divisors is an integer number (26779798305).

Almost surely, 2^211231131233 is an apocalyptic number.

It is an amenable number.

211231131233 is a deficient number, since it is larger than the sum of its proper divisors (3007255207).

211231131233 is an equidigital number, since it uses as much as digits as its factorization.

211231131233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7043107.

The product of its digits is 648, while the sum is 23.

Adding to 211231131233 its reverse (332131132112), we get a palindrome (543362263345).

The spelling of 211231131233 in words is "two hundred eleven billion, two hundred thirty-one million, one hundred thirty-one thousand, two hundred thirty-three".