121212011232 has 144 divisors (see below), whose sum is σ = 376753038480. Its totient is φ = 36739270656.

The previous prime is 121212011231. The next prime is 121212011243. The reversal of 121212011232 is 232110212121.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212011231) 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, 9244 + ... + 492452.

It is an arithmetic number, because the mean of its divisors is an integer number (2616340545).

Almost surely, 2^121212011232 is an apocalyptic number.

121212011232 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 121212011232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188376519240).

121212011232 is an abundant number, since it is smaller than the sum of its proper divisors (255541027248).

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

121212011232 is a wasteful number, since it uses less digits than its factorization.

121212011232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483305 (or 483294 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121212011232 its reverse (232110212121), we get a palindrome (353322223353).

The spelling of 121212011232 in words is "one hundred twenty-one billion, two hundred twelve million, eleven thousand, two hundred thirty-two".