2511241021 has 4 divisors (see below), whose sum is σ = 2572490844. Its totient is φ = 2449991200.

The previous prime is 2511241009. The next prime is 2511241093. The reversal of 2511241021 is 1201421152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 338376025 + 2172864996 = 18395^2 + 46614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2511241021 - 2¹⁵ = 2511208253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2511241021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2511241321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30624850 + ... + 30624931.

It is an arithmetic number, because the mean of its divisors is an integer number (643122711).

Almost surely, 2^2511241021 is an apocalyptic number.

It is an amenable number.

2511241021 is a deficient number, since it is larger than the sum of its proper divisors (61249823).

2511241021 is an equidigital number, since it uses as much as digits as its factorization.

2511241021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61249822.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2511241021 is about 50112.2841327354. The cubic root of 2511241021 is about 1359.2399554056.

Adding to 2511241021 its reverse (1201421152), we get a palindrome (3712662173).

The spelling of 2511241021 in words is "two billion, five hundred eleven million, two hundred forty-one thousand, twenty-one".