1161221713 has 2 divisors, whose sum is σ = 1161221714. Its totient is φ = 1161221712.

The previous prime is 1161221647. The next prime is 1161221729. The reversal of 1161221713 is 3171221611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1100116224 + 61105489 = 33168^2 + 7817^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161221713 - 2¹⁷ = 1161090641 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161221753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580610856 + 580610857.

It is an arithmetic number, because the mean of its divisors is an integer number (580610857).

Almost surely, 2^1161221713 is an apocalyptic number.

It is an amenable number.

1161221713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161221713 is an equidigital number, since it uses as much as digits as its factorization.

1161221713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 1161221713 is about 34076.7033763538. The cubic root of 1161221713 is about 1051.0863172939.

The spelling of 1161221713 in words is "one billion, one hundred sixty-one million, two hundred twenty-one thousand, seven hundred thirteen".