121321154432 has 32 divisors (see below), whose sum is σ = 255911814720. Its totient is φ = 57092306944.

The previous prime is 121321154417. The next prime is 121321154489. The reversal of 121321154432 is 234451123121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 121321154395 and 121321154404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27874928 + ... + 27879279.

It is an arithmetic number, because the mean of its divisors is an integer number (7997244210).

Almost surely, 2^121321154432 is an apocalyptic number.

It is an amenable number.

121321154432 is an abundant number, since it is smaller than the sum of its proper divisors (134590660288).

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

121321154432 is an equidigital number, since it uses as much as digits as its factorization.

121321154432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55754238 (or 55754226 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

Adding to 121321154432 its reverse (234451123121), we get a palindrome (355772277553).

The spelling of 121321154432 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred fifty-four thousand, four hundred thirty-two".