231241140221 has 16 divisors (see below), whose sum is σ = 301345922304. Its totient is φ = 172197667584.

The previous prime is 231241140217. The next prime is 231241140223. The reversal of 231241140221 is 122041142132.

It is a cyclic number.

It is not a de Polignac number, because 231241140221 - 2² = 231241140217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231241140223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74737025 + ... + 74740118.

It is an arithmetic number, because the mean of its divisors is an integer number (18834120144).

Almost surely, 2^231241140221 is an apocalyptic number.

It is an amenable number.

231241140221 is a deficient number, since it is larger than the sum of its proper divisors (70104782083).

231241140221 is a wasteful number, since it uses less digits than its factorization.

231241140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149477180.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 231241140221 its reverse (122041142132), we get a palindrome (353282282353).

The spelling of 231241140221 in words is "two hundred thirty-one billion, two hundred forty-one million, one hundred forty thousand, two hundred twenty-one".