21034130279 has 2 divisors, whose sum is σ = 21034130280. Its totient is φ = 21034130278.

The previous prime is 21034130267. The next prime is 21034130339. The reversal of 21034130279 is 97203143012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21034130279 - 2⁴ = 21034130263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21034130219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517065139 + 10517065140.

It is an arithmetic number, because the mean of its divisors is an integer number (10517065140).

Almost surely, 2^21034130279 is an apocalyptic number.

21034130279 is a deficient number, since it is larger than the sum of its proper divisors (1).

21034130279 is an equidigital number, since it uses as much as digits as its factorization.

21034130279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 21034130279 in words is "twenty-one billion, thirty-four million, one hundred thirty thousand, two hundred seventy-nine".