4331266621397 has 2 divisors, whose sum is σ = 4331266621398. Its totient is φ = 4331266621396.

The previous prime is 4331266621321. The next prime is 4331266621399. The reversal of 4331266621397 is 7931266621334.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4206596898001 + 124669723396 = 2050999^2 + 353086^2 .

It is a cyclic number.

It is not a de Polignac number, because 4331266621397 - 2¹⁴ = 4331266605013 is a prime.

Together with 4331266621399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4331266621399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2165633310698 + 2165633310699.

It is an arithmetic number, because the mean of its divisors is an integer number (2165633310699).

Almost surely, 2^{4331266621397} is an apocalyptic number.

It is an amenable number.

4331266621397 is a deficient number, since it is larger than the sum of its proper divisors (1).

4331266621397 is an equidigital number, since it uses as much as digits as its factorization.

4331266621397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 53.

The spelling of 4331266621397 in words is "four trillion, three hundred thirty-one billion, two hundred sixty-six million, six hundred twenty-one thousand, three hundred ninety-seven".