321233019997 has 2 divisors, whose sum is σ = 321233019998. Its totient is φ = 321233019996.

The previous prime is 321233019977. The next prime is 321233020013. The reversal of 321233019997 is 799910332123.

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., 241502462041 + 79730557956 = 491429^2 + 282366^2 .

It is a cyclic number.

It is not a de Polignac number, because 321233019997 - 2¹⁹ = 321232495709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321233019997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321233019917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160616509998 + 160616509999.

It is an arithmetic number, because the mean of its divisors is an integer number (160616509999).

Almost surely, 2^321233019997 is an apocalyptic number.

It is an amenable number.

321233019997 is a deficient number, since it is larger than the sum of its proper divisors (1).

321233019997 is an equidigital number, since it uses as much as digits as its factorization.

321233019997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 551124, while the sum is 49.

The spelling of 321233019997 in words is "three hundred twenty-one billion, two hundred thirty-three million, nineteen thousand, nine hundred ninety-seven".