1232121997 has 2 divisors, whose sum is σ = 1232121998. Its totient is φ = 1232121996.

The previous prime is 1232121991. The next prime is 1232122007. The reversal of 1232121997 is 7991212321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 782936361 + 449185636 = 27981^2 + 21194^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232121997 - 2¹¹ = 1232119949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232121991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616060998 + 616060999.

It is an arithmetic number, because the mean of its divisors is an integer number (616060999).

Almost surely, 2^1232121997 is an apocalyptic number.

It is an amenable number.

1232121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232121997 is an equidigital number, since it uses as much as digits as its factorization.

1232121997 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1232121997 is about 35101.5953626042. The cubic root of 1232121997 is about 1072.0570661521.

The spelling of 1232121997 in words is "one billion, two hundred thirty-two million, one hundred twenty-one thousand, nine hundred ninety-seven".