121131535 has 16 divisors (see below), whose sum is σ = 167049792. Its totient is φ = 82598400.

The previous prime is 121131533. The next prime is 121131541. The reversal of 121131535 is 535131121.

It is not a de Polignac number, because 121131535 - 2¹ = 121131533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121131533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3226 + ... + 15895.

It is an arithmetic number, because the mean of its divisors is an integer number (10440612).

Almost surely, 2^121131535 is an apocalyptic number.

121131535 is a deficient number, since it is larger than the sum of its proper divisors (45918257).

121131535 is a wasteful number, since it uses less digits than its factorization.

121131535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19314.

The product of its digits is 450, while the sum is 22.

The square root of 121131535 is about 11005.9772396639. The cubic root of 121131535 is about 494.7879035567.

Adding to 121131535 its reverse (535131121), we get a palindrome (656262656).

The spelling of 121131535 in words is "one hundred twenty-one million, one hundred thirty-one thousand, five hundred thirty-five".