11012100120521 has 2 divisors, whose sum is σ = 11012100120522. Its totient is φ = 11012100120520.

The previous prime is 11012100120499. The next prime is 11012100120533. The reversal of 11012100120521 is 12502100121011.

11012100120521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9419988640000 + 1592111480521 = 3069200^2 + 1261789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11012100120521 is a prime.

It is a super-2 number, since 2×11012100120521² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11012100120521.

It is not a weakly prime, because it can be changed into another prime (11014100120521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5506050060260 + 5506050060261.

It is an arithmetic number, because the mean of its divisors is an integer number (5506050060261).

Almost surely, 2^{11012100120521} is an apocalyptic number.

It is an amenable number.

11012100120521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012100120521 is an equidigital number, since it uses as much as digits as its factorization.

11012100120521 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 11012100120521 its reverse (12502100121011), we get a palindrome (23514200241532).

The spelling of 11012100120521 in words is "eleven trillion, twelve billion, one hundred million, one hundred twenty thousand, five hundred twenty-one".