21132140287 has 2 divisors, whose sum is σ = 21132140288. Its totient is φ = 21132140286.

The previous prime is 21132140219. The next prime is 21132140311. The reversal of 21132140287 is 78204123112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21132140287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132140387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566070143 + 10566070144.

It is an arithmetic number, because the mean of its divisors is an integer number (10566070144).

Almost surely, 2^21132140287 is an apocalyptic number.

21132140287 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132140287 is an equidigital number, since it uses as much as digits as its factorization.

21132140287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

Adding to 21132140287 its reverse (78204123112), we get a palindrome (99336263399).

The spelling of 21132140287 in words is "twenty-one billion, one hundred thirty-two million, one hundred forty thousand, two hundred eighty-seven".