120221640 has 192 divisors, whose sum is σ = 487244160. Its totient is φ = 24975360.

The previous prime is 120221639. The next prime is 120221653. The reversal of 120221640 is 46122021.

120221640 is a `hidden beast` number, since 1 + 2 + 0 + 2 + 21 + 640 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25552 + ... + 29888.

It is an arithmetic number, because the mean of its divisors is an integer number (2537730).

Almost surely, 2^120221640 is an apocalyptic number.

120221640 is a gapful number since it is divisible by the number (10) 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 120221640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243622080).

120221640 is an abundant number, since it is smaller than the sum of its proper divisors (367022520).

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

120221640 is a wasteful number, since it uses less digits than its factorization.

120221640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4372 (or 4365 counting only the distinct ones).

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

The square root of 120221640 is about 10964.5629187852. The cubic root of 120221640 is about 493.5459010098.

Adding to 120221640 its reverse (46122021), we get a palindrome (166343661).

The spelling of 120221640 in words is "one hundred twenty million, two hundred twenty-one thousand, six hundred forty".