22071530521 has 2 divisors, whose sum is σ = 22071530522. Its totient is φ = 22071530520.

The previous prime is 22071530513. The next prime is 22071530539. The reversal of 22071530521 is 12503517022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12688896025 + 9382634496 = 112645^2 + 96864^2 .

It is a cyclic number.

It is not a de Polignac number, because 22071530521 - 2³ = 22071530513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22071530521.

It is not a weakly prime, because it can be changed into another prime (22071530581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11035765260 + 11035765261.

It is an arithmetic number, because the mean of its divisors is an integer number (11035765261).

Almost surely, 2^22071530521 is an apocalyptic number.

It is an amenable number.

22071530521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22071530521 is an equidigital number, since it uses as much as digits as its factorization.

22071530521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 22071530521 in words is "twenty-two billion, seventy-one million, five hundred thirty thousand, five hundred twenty-one".