21761130151 has 2 divisors, whose sum is σ = 21761130152. Its totient is φ = 21761130150.

The previous prime is 21761130077. The next prime is 21761130221. The reversal of 21761130151 is 15103116712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21761130151 - 2¹⁵ = 21761097383 is a prime.

It is a super-2 number, since 2×21761130151² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21761130851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10880565075 + 10880565076.

It is an arithmetic number, because the mean of its divisors is an integer number (10880565076).

Almost surely, 2^21761130151 is an apocalyptic number.

21761130151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21761130151 is an equidigital number, since it uses as much as digits as its factorization.

21761130151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 28.

Adding to 21761130151 its reverse (15103116712), we get a palindrome (36864246863).

The spelling of 21761130151 in words is "twenty-one billion, seven hundred sixty-one million, one hundred thirty thousand, one hundred fifty-one".