21013245151 has 2 divisors, whose sum is σ = 21013245152. Its totient is φ = 21013245150.

The previous prime is 21013245109. The next prime is 21013245163. The reversal of 21013245151 is 15154231012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21013245151 - 2⁷ = 21013245023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21013245101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506622575 + 10506622576.

It is an arithmetic number, because the mean of its divisors is an integer number (10506622576).

Almost surely, 2^21013245151 is an apocalyptic number.

21013245151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013245151 is an equidigital number, since it uses as much as digits as its factorization.

21013245151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 21013245151 its reverse (15154231012), we get a palindrome (36167476163).

The spelling of 21013245151 in words is "twenty-one billion, thirteen million, two hundred forty-five thousand, one hundred fifty-one".