121212024252 has 96 divisors (see below), whose sum is σ = 313322300928. Its totient is φ = 36165600000.

The previous prime is 121212024229. The next prime is 121212024257. The reversal of 121212024252 is 252420212121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212024257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2387977 + ... + 2438207.

It is an arithmetic number, because the mean of its divisors is an integer number (3263773968).

Almost surely, 2^121212024252 is an apocalyptic number.

121212024252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121212024252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156661150464).

121212024252 is an abundant number, since it is smaller than the sum of its proper divisors (192110276676).

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

121212024252 is a wasteful number, since it uses less digits than its factorization.

121212024252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50531 (or 50529 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 121212024252 its reverse (252420212121), we get a palindrome (373632236373).

The spelling of 121212024252 in words is "one hundred twenty-one billion, two hundred twelve million, twenty-four thousand, two hundred fifty-two".