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120100221 = 3216779907
BaseRepresentation
bin1110010100010…
…01010101111101
322100222201112100
413022021111331
5221221201341
615530055313
72655556263
oct712112575
9270881470
10120100221
116188008a
123427a539
131bb60727
1411d44433
15a8253b6
hex728957d

120100221 has 12 divisors (see below), whose sum is σ = 174519072. Its totient is φ = 79586376.

The previous prime is 120100213. The next prime is 120100289. The reversal of 120100221 is 122001021.

It is not a de Polignac number, because 120100221 - 23 = 120100213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120500221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38451 + ... + 41456.

It is an arithmetic number, because the mean of its divisors is an integer number (14543256).

Almost surely, 2120100221 is an apocalyptic number.

It is an amenable number.

120100221 is a deficient number, since it is larger than the sum of its proper divisors (54418851).

120100221 is a wasteful number, since it uses less digits than its factorization.

120100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80080 (or 80077 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 120100221 is about 10959.0246372567. The cubic root of 120100221 is about 493.3796912345.

Adding to 120100221 its reverse (122001021), we get a palindrome (242101242).

The spelling of 120100221 in words is "one hundred twenty million, one hundred thousand, two hundred twenty-one".