1213220323097 has 2 divisors, whose sum is σ = 1213220323098. Its totient is φ = 1213220323096.

The previous prime is 1213220323093. The next prime is 1213220323163. The reversal of 1213220323097 is 7903230223121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 841808085001 + 371412238096 = 917501^2 + 609436^2 .

It is an emirp because it is prime and its reverse (7903230223121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213220323097 - 2² = 1213220323093 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213220323093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606610161548 + 606610161549.

It is an arithmetic number, because the mean of its divisors is an integer number (606610161549).

Almost surely, 2^{1213220323097} is an apocalyptic number.

It is an amenable number.

1213220323097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213220323097 is an equidigital number, since it uses as much as digits as its factorization.

1213220323097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The spelling of 1213220323097 in words is "one trillion, two hundred thirteen billion, two hundred twenty million, three hundred twenty-three thousand, ninety-seven".