120221224155 has 72 divisors (see below), whose sum is σ = 228503842944. Its totient is φ = 58399488000.

The previous prime is 120221224061. The next prime is 120221224213. The reversal of 120221224155 is 551422122021.

120221224155 is a `hidden beast` number, since 1 + 2 + 0 + 221 + 22 + 415 + 5 = 666.

It is not a de Polignac number, because 120221224155 - 2¹² = 120221220059 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 254055 + ... + 552255.

Almost surely, 2^120221224155 is an apocalyptic number.

120221224155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120221224155 is a deficient number, since it is larger than the sum of its proper divisors (108282618789).

120221224155 is a wasteful number, since it uses less digits than its factorization.

120221224155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298277 (or 298257 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 120221224155 its reverse (551422122021), we get a palindrome (671643346176).

The spelling of 120221224155 in words is "one hundred twenty billion, two hundred twenty-one million, two hundred twenty-four thousand, one hundred fifty-five".