2640007121 has 2 divisors, whose sum is σ = 2640007122. Its totient is φ = 2640007120.

The previous prime is 2640007103. The next prime is 2640007177. The reversal of 2640007121 is 1217000462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2202988096 + 437019025 = 46936^2 + 20905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640007121 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640007021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320003560 + 1320003561.

It is an arithmetic number, because the mean of its divisors is an integer number (1320003561).

Almost surely, 2^2640007121 is an apocalyptic number.

It is an amenable number.

2640007121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640007121 is an equidigital number, since it uses as much as digits as its factorization.

2640007121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2640007121 is about 51380.9996107511. Note that the first 3 decimals coincide. The cubic root of 2640007121 is about 1382.0858886558.

Adding to 2640007121 its reverse (1217000462), we get a palindrome (3857007583).

The spelling of 2640007121 in words is "two billion, six hundred forty million, seven thousand, one hundred twenty-one".