121533343316 has 72 divisors (see below), whose sum is σ = 269767155840. Its totient is φ = 46890803520.

The previous prime is 121533343291. The next prime is 121533343319. The reversal of 121533343316 is 613343335121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121533343319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174830 + ... + 523098.

Almost surely, 2^121533343316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121533343316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134883577920).

121533343316 is an abundant number, since it is smaller than the sum of its proper divisors (148233812524).

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

121533343316 is a wasteful number, since it uses less digits than its factorization.

121533343316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348405 (or 348392 counting only the distinct ones).

The product of its digits is 58320, while the sum is 35.

Adding to 121533343316 its reverse (613343335121), we get a palindrome (734876678437).

The spelling of 121533343316 in words is "one hundred twenty-one billion, five hundred thirty-three million, three hundred forty-three thousand, three hundred sixteen".