2169024721 has 2 divisors, whose sum is σ = 2169024722. Its totient is φ = 2169024720.

The previous prime is 2169024703. The next prime is 2169024731. The reversal of 2169024721 is 1274209612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1269924496 + 899100225 = 35636^2 + 29985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2169024721 - 2⁷ = 2169024593 is a prime.

It is not a weakly prime, because it can be changed into another prime (2169024731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084512360 + 1084512361.

It is an arithmetic number, because the mean of its divisors is an integer number (1084512361).

Almost surely, 2^2169024721 is an apocalyptic number.

It is an amenable number.

2169024721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2169024721 is an equidigital number, since it uses as much as digits as its factorization.

2169024721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 2169024721 is about 46572.7894912899. The cubic root of 2169024721 is about 1294.4586062496.

The spelling of 2169024721 in words is "two billion, one hundred sixty-nine million, twenty-four thousand, seven hundred twenty-one".