2421016261 has 2 divisors, whose sum is σ = 2421016262. Its totient is φ = 2421016260.

The previous prime is 2421016249. The next prime is 2421016267. The reversal of 2421016261 is 1626101242.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1235522500 + 1185493761 = 35150^2 + 34431^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421016261 - 2¹¹ = 2421014213 is a prime.

It is a super-2 number, since 2×2421016261² = 11722639472052840242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421016267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210508130 + 1210508131.

It is an arithmetic number, because the mean of its divisors is an integer number (1210508131).

Almost surely, 2^2421016261 is an apocalyptic number.

It is an amenable number.

2421016261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421016261 is an equidigital number, since it uses as much as digits as its factorization.

2421016261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2421016261 is about 49203.8236420707. The cubic root of 2421016261 is about 1342.7625973677.

The spelling of 2421016261 in words is "two billion, four hundred twenty-one million, sixteen thousand, two hundred sixty-one".