1213131097 has 2 divisors, whose sum is σ = 1213131098. Its totient is φ = 1213131096.

The previous prime is 1213131077. The next prime is 1213131109. The reversal of 1213131097 is 7901313121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166632336 + 46498761 = 34156^2 + 6819^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213131097 - 2⁷ = 1213130969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213131077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606565548 + 606565549.

It is an arithmetic number, because the mean of its divisors is an integer number (606565549).

Almost surely, 2^1213131097 is an apocalyptic number.

It is an amenable number.

1213131097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213131097 is an equidigital number, since it uses as much as digits as its factorization.

1213131097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 1213131097 is about 34830.0315388890. The cubic root of 1213131097 is about 1066.5205921821.

The spelling of 1213131097 in words is "one billion, two hundred thirteen million, one hundred thirty-one thousand, ninety-seven".