2040121217 has 2 divisors, whose sum is σ = 2040121218. Its totient is φ = 2040121216.

The previous prime is 2040121211. The next prime is 2040121273. The reversal of 2040121217 is 7121210402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1287661456 + 752459761 = 35884^2 + 27431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2040121217 is a prime.

It is a super-2 number, since 2×2040121217² = 8324189160107122178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2040121211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020060608 + 1020060609.

It is an arithmetic number, because the mean of its divisors is an integer number (1020060609).

Almost surely, 2^2040121217 is an apocalyptic number.

It is an amenable number.

2040121217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040121217 is an equidigital number, since it uses as much as digits as its factorization.

2040121217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 2040121217 is about 45167.7010373563. The cubic root of 2040121217 is about 1268.2902607258.

Adding to 2040121217 its reverse (7121210402), we get a palindrome (9161331619).

The spelling of 2040121217 in words is "two billion, forty million, one hundred twenty-one thousand, two hundred seventeen".