11259214215521 has 2 divisors, whose sum is σ = 11259214215522. Its totient is φ = 11259214215520.

The previous prime is 11259214215499. The next prime is 11259214215523. The reversal of 11259214215521 is 12551241295211.

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., 8664663216400 + 2594550999121 = 2943580^2 + 1610761^2 .

It is a cyclic number.

It is not a de Polignac number, because 11259214215521 - 2¹⁰ = 11259214214497 is a prime.

Together with 11259214215523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11259214215523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5629607107760 + 5629607107761.

It is an arithmetic number, because the mean of its divisors is an integer number (5629607107761).

Almost surely, 2^{11259214215521} is an apocalyptic number.

It is an amenable number.

11259214215521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11259214215521 is an equidigital number, since it uses as much as digits as its factorization.

11259214215521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 41.

The spelling of 11259214215521 in words is "eleven trillion, two hundred fifty-nine billion, two hundred fourteen million, two hundred fifteen thousand, five hundred twenty-one".