231321212211 has 8 divisors (see below), whose sum is σ = 308436457680. Its totient is φ = 154210054112.

The previous prime is 231321212203. The next prime is 231321212249. The reversal of 231321212211 is 112212123132.

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 231321212211 - 2³ = 231321212203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231321214211) 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, 887256 + ... + 1117973.

It is an arithmetic number, because the mean of its divisors is an integer number (38554557210).

Almost surely, 2^231321212211 is an apocalyptic number.

231321212211 is a deficient number, since it is larger than the sum of its proper divisors (77115245469).

231321212211 is a wasteful number, since it uses less digits than its factorization.

231321212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043685.

The product of its digits is 288, while the sum is 21.

Adding to 231321212211 its reverse (112212123132), we get a palindrome (343533335343).

The spelling of 231321212211 in words is "two hundred thirty-one billion, three hundred twenty-one million, two hundred twelve thousand, two hundred eleven".