21112986151 has 2 divisors, whose sum is σ = 21112986152. Its totient is φ = 21112986150.

The previous prime is 21112986119. The next prime is 21112986161. The reversal of 21112986151 is 15168921112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112986151 - 2⁵ = 21112986119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21112986151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112986161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556493075 + 10556493076.

It is an arithmetic number, because the mean of its divisors is an integer number (10556493076).

Almost surely, 2^21112986151 is an apocalyptic number.

21112986151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112986151 is an equidigital number, since it uses as much as digits as its factorization.

21112986151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 37.

The spelling of 21112986151 in words is "twenty-one billion, one hundred twelve million, nine hundred eighty-six thousand, one hundred fifty-one".