231321002211 has 12 divisors (see below), whose sum is σ = 359832670288. Its totient is φ = 142351385904.

The previous prime is 231321002189. The next prime is 231321002257. The reversal of 231321002211 is 112200123132.

231321002211 is a `hidden beast` number, since 231 + 3 + 210 + 0 + 221 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-231321002211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231321002261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 988551175 + ... + 988551408.

Almost surely, 2^231321002211 is an apocalyptic number.

231321002211 is a deficient number, since it is larger than the sum of its proper divisors (128511668077).

231321002211 is a wasteful number, since it uses less digits than its factorization.

231321002211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977102602 (or 1977102599 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231321002211 its reverse (112200123132), we get a palindrome (343521125343).

The spelling of 231321002211 in words is "two hundred thirty-one billion, three hundred twenty-one million, two thousand, two hundred eleven".