121533306 has 32 divisors (see below), whose sum is σ = 257836608. Its totient is φ = 38058240.

The previous prime is 121533301. The next prime is 121533319. The reversal of 121533306 is 603335121.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121533301) 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, 107661 + ... + 108783.

It is an arithmetic number, because the mean of its divisors is an integer number (8057394).

Almost surely, 2^121533306 is an apocalyptic number.

121533306 is an abundant number, since it is smaller than the sum of its proper divisors (136303302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121533306 is a wasteful number, since it uses less digits than its factorization.

121533306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 121533306 is about 11024.2145298429. The cubic root of 121533306 is about 495.3343399851.

Adding to 121533306 its reverse (603335121), we get a palindrome (724868427).

The spelling of 121533306 in words is "one hundred twenty-one million, five hundred thirty-three thousand, three hundred six".