10990601521 has 2 divisors, whose sum is σ = 10990601522. Its totient is φ = 10990601520.

The previous prime is 10990601513. The next prime is 10990601527. The reversal of 10990601521 is 12510609901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6393761521 + 4596840000 = 79961^2 + 67800^2 .

It is an emirp because it is prime and its reverse (12510609901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10990601521 - 2³ = 10990601513 is a prime.

It is not a weakly prime, because it can be changed into another prime (10990601527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5495300760 + 5495300761.

It is an arithmetic number, because the mean of its divisors is an integer number (5495300761).

Almost surely, 2^10990601521 is an apocalyptic number.

It is an amenable number.

10990601521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10990601521 is an equidigital number, since it uses as much as digits as its factorization.

10990601521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 34.

The spelling of 10990601521 in words is "ten billion, nine hundred ninety million, six hundred one thousand, five hundred twenty-one".