12102321997 has 2 divisors, whose sum is σ = 12102321998. Its totient is φ = 12102321996.

The previous prime is 12102321949. The next prime is 12102322013. The reversal of 12102321997 is 79912320121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11782234116 + 320087881 = 108546^2 + 17891^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102321997 - 2¹⁹ = 12101797709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12102321197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051160998 + 6051160999.

It is an arithmetic number, because the mean of its divisors is an integer number (6051160999).

Almost surely, 2^12102321997 is an apocalyptic number.

It is an amenable number.

12102321997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102321997 is an equidigital number, since it uses as much as digits as its factorization.

12102321997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 12102321997 in words is "twelve billion, one hundred two million, three hundred twenty-one thousand, nine hundred ninety-seven".