11535415121 has 2 divisors, whose sum is σ = 11535415122. Its totient is φ = 11535415120.

The previous prime is 11535415103. The next prime is 11535415123. The reversal of 11535415121 is 12151453511.

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., 11334796225 + 200618896 = 106465^2 + 14164^2 .

It is a cyclic number.

It is not a de Polignac number, because 11535415121 - 2¹⁰ = 11535414097 is a prime.

Together with 11535415123, 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 (11535415123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5767707560 + 5767707561.

It is an arithmetic number, because the mean of its divisors is an integer number (5767707561).

Almost surely, 2^11535415121 is an apocalyptic number.

It is an amenable number.

11535415121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11535415121 is an equidigital number, since it uses as much as digits as its factorization.

11535415121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 29.

Adding to 11535415121 its reverse (12151453511), we get a palindrome (23686868632).

The spelling of 11535415121 in words is "eleven billion, five hundred thirty-five million, four hundred fifteen thousand, one hundred twenty-one".