231202123321 has 4 divisors (see below), whose sum is σ = 248986902052. Its totient is φ = 213417344592.

The previous prime is 231202123307. The next prime is 231202123331. The reversal of 231202123321 is 123321202132.

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 14050783296 + 217151340025 = 118536^2 + 465995^2 .

It is a cyclic number.

It is not a de Polignac number, because 231202123321 - 2¹¹ = 231202121273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231202123292 and 231202123301.

It is not an unprimeable number, because it can be changed into a prime (231202123331) 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, 8892389346 + ... + 8892389371.

It is an arithmetic number, because the mean of its divisors is an integer number (62246725513).

Almost surely, 2^231202123321 is an apocalyptic number.

It is an amenable number.

231202123321 is a deficient number, since it is larger than the sum of its proper divisors (17784778731).

231202123321 is a wasteful number, since it uses less digits than its factorization.

231202123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17784778730.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 231202123321 its reverse (123321202132), we get a palindrome (354523325453).

The spelling of 231202123321 in words is "two hundred thirty-one billion, two hundred two million, one hundred twenty-three thousand, three hundred twenty-one".