32401121220 has 144 divisors (see below), whose sum is σ = 107334968832. Its totient is φ = 7863287040.

The previous prime is 32401121213. The next prime is 32401121239. The reversal of 32401121220 is 2212110423.

It is a happy number.

32401121220 is a `hidden beast` number, since 32 + 401 + 1 + 212 + 20 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 32401121193 and 32401121202.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 68629 + ... + 263651.

It is an arithmetic number, because the mean of its divisors is an integer number (745381728).

Almost surely, 2^32401121220 is an apocalyptic number.

32401121220 is a gapful number since it is divisible by the number (30) 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 32401121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53667484416).

32401121220 is an abundant number, since it is smaller than the sum of its proper divisors (74933847612).

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

32401121220 is a wasteful number, since it uses less digits than its factorization.

32401121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195122 (or 195117 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 32401121220 its reverse (2212110423), we get a palindrome (34613231643).

The spelling of 32401121220 in words is "thirty-two billion, four hundred one million, one hundred twenty-one thousand, two hundred twenty".