120221620 has 48 divisors (see below), whose sum is σ = 268349760. Its totient is φ = 45085184.

The previous prime is 120221597. The next prime is 120221639. The reversal of 120221620 is 26122021.

It is a junction number, because it is equal to n+sod(n) for n = 120221594 and 120221603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117471 + ... + 118489.

It is an arithmetic number, because the mean of its divisors is an integer number (5590620).

Almost surely, 2^120221620 is an apocalyptic number.

120221620 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 120221620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134174880).

120221620 is an abundant number, since it is smaller than the sum of its proper divisors (148128140).

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

120221620 is a wasteful number, since it uses less digits than its factorization.

120221620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392 (or 1390 counting only the distinct ones).

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

The square root of 120221620 is about 10964.5620067561. The cubic root of 120221620 is about 493.5458736412.

Adding to 120221620 its reverse (26122021), we get a palindrome (146343641).

It can be divided in two parts, 1202 and 21620, that added together give a palindrome (22822).

The spelling of 120221620 in words is "one hundred twenty million, two hundred twenty-one thousand, six hundred twenty".