121533212424 has 32 divisors (see below), whose sum is σ = 327204803520. Its totient is φ = 37394834496.

The previous prime is 121533212407. The next prime is 121533212447. The reversal of 121533212424 is 424212335121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121533212391 and 121533212400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194764452 + ... + 194765075.

It is an arithmetic number, because the mean of its divisors is an integer number (10225150110).

Almost surely, 2^121533212424 is an apocalyptic number.

It is an amenable number.

121533212424 is an abundant number, since it is smaller than the sum of its proper divisors (205671591096).

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

121533212424 is a wasteful number, since it uses less digits than its factorization.

121533212424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389529549 (or 389529545 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

Adding to 121533212424 its reverse (424212335121), we get a palindrome (545745547545).

The spelling of 121533212424 in words is "one hundred twenty-one billion, five hundred thirty-three million, two hundred twelve thousand, four hundred twenty-four".