231121320211 has 8 divisors (see below), whose sum is σ = 236800122048. Its totient is φ = 225444504000.

The previous prime is 231121320091. The next prime is 231121320223. The reversal of 231121320211 is 112023121132.

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-231121320211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231121320511) 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, 259380 + ... + 727681.

It is an arithmetic number, because the mean of its divisors is an integer number (29600015256).

Almost surely, 2^231121320211 is an apocalyptic number.

231121320211 is a deficient number, since it is larger than the sum of its proper divisors (5678801837).

231121320211 is an equidigital number, since it uses as much as digits as its factorization.

231121320211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992813.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231121320211 its reverse (112023121132), we get a palindrome (343144441343).

The spelling of 231121320211 in words is "two hundred thirty-one billion, one hundred twenty-one million, three hundred twenty thousand, two hundred eleven".