231212121113321 has 2 divisors, whose sum is σ = 231212121113322. Its totient is φ = 231212121113320.

The previous prime is 231212121113249. The next prime is 231212121113377. The reversal of 231212121113321 is 123311121212132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196930393509721 + 34281727603600 = 14033189^2 + 5855060^2 .

It is a cyclic number.

It is not a de Polignac number, because 231212121113321 - 2⁴² = 226814074602217 is a prime.

It is not a weakly prime, because it can be changed into another prime (231212121113381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115606060556660 + 115606060556661.

It is an arithmetic number, because the mean of its divisors is an integer number (115606060556661).

Almost surely, 2^{231212121113321} is an apocalyptic number.

It is an amenable number.

231212121113321 is a deficient number, since it is larger than the sum of its proper divisors (1).

231212121113321 is an equidigital number, since it uses as much as digits as its factorization.

231212121113321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

Adding to 231212121113321 its reverse (123311121212132), we get a palindrome (354523242325453).

The spelling of 231212121113321 in words is "two hundred thirty-one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred thirteen thousand, three hundred twenty-one".