11021002011521 has 2 divisors, whose sum is σ = 11021002011522. Its totient is φ = 11021002011520.

The previous prime is 11021002011449. The next prime is 11021002011529. The reversal of 11021002011521 is 12511020012011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10241030425921 + 779971585600 = 3200161^2 + 883160^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021002011521 - 2³⁸ = 10746124104577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11021002011521.

It is not a weakly prime, because it can be changed into another prime (11021002011529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510501005760 + 5510501005761.

It is an arithmetic number, because the mean of its divisors is an integer number (5510501005761).

Almost surely, 2^{11021002011521} is an apocalyptic number.

It is an amenable number.

11021002011521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021002011521 is an equidigital number, since it uses as much as digits as its factorization.

11021002011521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 11021002011521 its reverse (12511020012011), we get a palindrome (23532022023532).

The spelling of 11021002011521 in words is "eleven trillion, twenty-one billion, two million, eleven thousand, five hundred twenty-one".