21323044151 has 2 divisors, whose sum is σ = 21323044152. Its totient is φ = 21323044150.

The previous prime is 21323044103. The next prime is 21323044159. The reversal of 21323044151 is 15144032312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21323044151 - 2¹⁰ = 21323043127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21323044151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21323044159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661522075 + 10661522076.

It is an arithmetic number, because the mean of its divisors is an integer number (10661522076).

Almost surely, 2^21323044151 is an apocalyptic number.

21323044151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323044151 is an equidigital number, since it uses as much as digits as its factorization.

21323044151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21323044151 its reverse (15144032312), we get a palindrome (36467076463).

The spelling of 21323044151 in words is "twenty-one billion, three hundred twenty-three million, forty-four thousand, one hundred fifty-one".