11215209751 has 2 divisors, whose sum is σ = 11215209752. Its totient is φ = 11215209750.

The previous prime is 11215209671. The next prime is 11215209767. The reversal of 11215209751 is 15790251211.

It is a happy number.

11215209751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11215209751 - 2⁷ = 11215209623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11215209851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5607604875 + 5607604876.

It is an arithmetic number, because the mean of its divisors is an integer number (5607604876).

Almost surely, 2^11215209751 is an apocalyptic number.

11215209751 is a deficient number, since it is larger than the sum of its proper divisors (1).

11215209751 is an equidigital number, since it uses as much as digits as its factorization.

11215209751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 34.

The spelling of 11215209751 in words is "eleven billion, two hundred fifteen million, two hundred nine thousand, seven hundred fifty-one".