21144264151 has 2 divisors, whose sum is σ = 21144264152. Its totient is φ = 21144264150.

The previous prime is 21144264143. The next prime is 21144264179. The reversal of 21144264151 is 15146244112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21144264151 - 2³ = 21144264143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21144264121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572132075 + 10572132076.

It is an arithmetic number, because the mean of its divisors is an integer number (10572132076).

Almost surely, 2^21144264151 is an apocalyptic number.

21144264151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144264151 is an equidigital number, since it uses as much as digits as its factorization.

21144264151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 31.

The spelling of 21144264151 in words is "twenty-one billion, one hundred forty-four million, two hundred sixty-four thousand, one hundred fifty-one".