2120121232 has 60 divisors (see below), whose sum is σ = 4524085440. Its totient is φ = 960543936.

The previous prime is 2120121197. The next prime is 2120121233. The reversal of 2120121232 is 2321210212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (2120121233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124869 + ... + 140827.

It is an arithmetic number, because the mean of its divisors is an integer number (75401424).

Almost surely, 2^2120121232 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 2120121232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2262042720).

2120121232 is an abundant number, since it is smaller than the sum of its proper divisors (2403964208).

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

2120121232 is a wasteful number, since it uses less digits than its factorization.

2120121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16028 (or 16003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2120121232 is about 46044.7742094583. The cubic root of 2120121232 is about 1284.6561444258.

Adding to 2120121232 its reverse (2321210212), we get a palindrome (4441331444).

The spelling of 2120121232 in words is "two billion, one hundred twenty million, one hundred twenty-one thousand, two hundred thirty-two".