21031132289 has 2 divisors, whose sum is σ = 21031132290. Its totient is φ = 21031132288.

The previous prime is 21031132277. The next prime is 21031132303. The reversal of 21031132289 is 98223113012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14246809600 + 6784322689 = 119360^2 + 82367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21031132289 is a prime.

It is not a weakly prime, because it can be changed into another prime (21031132249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515566144 + 10515566145.

It is an arithmetic number, because the mean of its divisors is an integer number (10515566145).

Almost surely, 2^21031132289 is an apocalyptic number.

It is an amenable number.

21031132289 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031132289 is an equidigital number, since it uses as much as digits as its factorization.

21031132289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 21031132289 in words is "twenty-one billion, thirty-one million, one hundred thirty-two thousand, two hundred eighty-nine".