11121521142135 has 16 divisors (see below), whose sum is σ = 17845714624896. Its totient is φ = 5914384343328.

The previous prime is 11121521142113. The next prime is 11121521142169. The reversal of 11121521142135 is 53124112512111.

It is a happy number.

It is not a de Polignac number, because 11121521142135 - 2¹¹ = 11121521140087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1068344569 + ... + 1068354978.

It is an arithmetic number, because the mean of its divisors is an integer number (1115357164056).

Almost surely, 2^{11121521142135} is an apocalyptic number.

11121521142135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11121521142135 is a deficient number, since it is larger than the sum of its proper divisors (6724193482761).

11121521142135 is a wasteful number, since it uses less digits than its factorization.

11121521142135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136699902.

The product of its digits is 2400, while the sum is 30.

Adding to 11121521142135 its reverse (53124112512111), we get a palindrome (64245633654246).

The spelling of 11121521142135 in words is "eleven trillion, one hundred twenty-one billion, five hundred twenty-one million, one hundred forty-two thousand, one hundred thirty-five".