121540533 has 16 divisors (see below), whose sum is σ = 169413120. Its totient is φ = 77360624.

The previous prime is 121540513. The next prime is 121540541. The reversal of 121540533 is 335045121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121540533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121540513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45838 + ... + 48416.

It is an arithmetic number, because the mean of its divisors is an integer number (10588320).

Almost surely, 2^121540533 is an apocalyptic number.

It is an amenable number.

121540533 is a deficient number, since it is larger than the sum of its proper divisors (47872587).

121540533 is a wasteful number, since it uses less digits than its factorization.

121540533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 121540533 is about 11024.5423034247. The cubic root of 121540533 is about 495.3441581725.

Adding to 121540533 its reverse (335045121), we get a palindrome (456585654).

The spelling of 121540533 in words is "one hundred twenty-one million, five hundred forty thousand, five hundred thirty-three".