120221655 has 8 divisors (see below), whose sum is σ = 192354672. Its totient is φ = 64118208.

The previous prime is 120221653. The next prime is 120221657. The reversal of 120221655 is 556122021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (120221653) and next prime (120221657).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120221655 - 2¹ = 120221653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4007374 + ... + 4007403.

It is an arithmetic number, because the mean of its divisors is an integer number (24044334).

Almost surely, 2^120221655 is an apocalyptic number.

120221655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120221655 is a deficient number, since it is larger than the sum of its proper divisors (72133017).

120221655 is an equidigital number, since it uses as much as digits as its factorization.

120221655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8014785.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 120221655 is about 10964.5636028070. The cubic root of 120221655 is about 493.5459215363.

Adding to 120221655 its reverse (556122021), we get a palindrome (676343676).

The spelling of 120221655 in words is "one hundred twenty million, two hundred twenty-one thousand, six hundred fifty-five".