231241202321 has 4 divisors (see below), whose sum is σ = 231268348644. Its totient is φ = 231214056000.

The previous prime is 231241202317. The next prime is 231241202347. The reversal of 231241202321 is 123202142132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71804705296 + 159436497025 = 267964^2 + 399295^2 .

It is a cyclic number.

It is not a de Polignac number, because 231241202321 - 2² = 231241202317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231241202021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13560380 + ... + 13577421.

It is an arithmetic number, because the mean of its divisors is an integer number (57817087161).

Almost surely, 2^231241202321 is an apocalyptic number.

It is an amenable number.

231241202321 is a deficient number, since it is larger than the sum of its proper divisors (27146323).

231241202321 is an equidigital number, since it uses as much as digits as its factorization.

231241202321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27146322.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 231241202321 its reverse (123202142132), we get a palindrome (354443344453).

The spelling of 231241202321 in words is "two hundred thirty-one billion, two hundred forty-one million, two hundred two thousand, three hundred twenty-one".