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BaseRepresentation
bin1110010100011…
…00000001110101
322101000021121202
413022030001311
5221222024341
615530222245
72655633326
oct712140165
9271007552
10120111221
116188837a
1234284985
131bb65739
1411d4844d
15a82879b
hex728c075

120111221 has 8 divisors (see below), whose sum is σ = 125544384. Its totient is φ = 114695680.

The previous prime is 120111191. The next prime is 120111223. The reversal of 120111221 is 122111021.

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

It is a cyclic number.

It is not a de Polignac number, because 120111221 - 218 = 119849077 is a prime.

It is a super-2 number, since 2×1201112212 = 28853410820221682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120111223) 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, 10670 + ... + 18816.

It is an arithmetic number, because the mean of its divisors is an integer number (15693048).

Almost surely, 2120111221 is an apocalyptic number.

It is an amenable number.

120111221 is a deficient number, since it is larger than the sum of its proper divisors (5433163).

120111221 is an equidigital number, since it uses as much as digits as its factorization.

120111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8811.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 120111221 is about 10959.5264952460. The cubic root of 120111221 is about 493.3947536851.

Adding to 120111221 its reverse (122111021), we get a palindrome (242222242).

The spelling of 120111221 in words is "one hundred twenty million, one hundred eleven thousand, two hundred twenty-one".