121221013232 has 80 divisors (see below), whose sum is σ = 269883024000. Its totient is φ = 52165451520.

The previous prime is 121221013189. The next prime is 121221013241. The reversal of 121221013232 is 232310122121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5329019 + ... + 5351717.

It is an arithmetic number, because the mean of its divisors is an integer number (3373537800).

Almost surely, 2^121221013232 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 121221013232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134941512000).

121221013232 is an abundant number, since it is smaller than the sum of its proper divisors (148662010768).

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

121221013232 is a wasteful number, since it uses less digits than its factorization.

121221013232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24334 (or 24328 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121221013232 its reverse (232310122121), we get a palindrome (353531135353).

The spelling of 121221013232 in words is "one hundred twenty-one billion, two hundred twenty-one million, thirteen thousand, two hundred thirty-two".