231000210122321 has 2 divisors, whose sum is σ = 231000210122322. Its totient is φ = 231000210122320.

The previous prime is 231000210122299. The next prime is 231000210122371. The reversal of 231000210122321 is 123221012000132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119462954467921 + 111537255654400 = 10929911^2 + 10561120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231000210122321 is a prime.

It is a super-2 number, since 2×231000210122321² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231000210122293 and 231000210122302.

It is not a weakly prime, because it can be changed into another prime (231000210122371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115500105061160 + 115500105061161.

It is an arithmetic number, because the mean of its divisors is an integer number (115500105061161).

Almost surely, 2^{231000210122321} is an apocalyptic number.

It is an amenable number.

231000210122321 is a deficient number, since it is larger than the sum of its proper divisors (1).

231000210122321 is an equidigital number, since it uses as much as digits as its factorization.

231000210122321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 231000210122321 its reverse (123221012000132), we get a palindrome (354221222122453).

The spelling of 231000210122321 in words is "two hundred thirty-one trillion, two hundred ten million, one hundred twenty-two thousand, three hundred twenty-one".