2551122011 has 4 divisors (see below), whose sum is σ = 2551402224. Its totient is φ = 2550841800.

The previous prime is 2551121999. The next prime is 2551122043. The reversal of 2551122011 is 1102211552.

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

It is a cyclic number.

It is not a de Polignac number, because 2551122011 - 2²² = 2546927707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551122911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125975 + ... + 144816.

It is an arithmetic number, because the mean of its divisors is an integer number (637850556).

Almost surely, 2^2551122011 is an apocalyptic number.

2551122011 is a deficient number, since it is larger than the sum of its proper divisors (280213).

2551122011 is an equidigital number, since it uses as much as digits as its factorization.

2551122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280212.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 2551122011 is about 50508.6330343635. The cubic root of 2551122011 is about 1366.3975562204.

Adding to 2551122011 its reverse (1102211552), we get a palindrome (3653333563).

The spelling of 2551122011 in words is "two billion, five hundred fifty-one million, one hundred twenty-two thousand, eleven".