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122211121 = 236187107
BaseRepresentation
bin1110100100011…
…00101100110001
322111221222010211
413102030230301
5222241223441
620043224121
73012530434
oct722145461
9274858124
10122211121
1162a9202a
1234b18041
131c41c496
141233381b
15aae0a81
hex748cb31

122211121 has 8 divisors (see below), whose sum is σ = 129616704. Its totient is φ = 114979920.

The previous prime is 122211091. The next prime is 122211157. The reversal of 122211121 is 121112221.

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 122211121 - 213 = 122202929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122211161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42151 + ... + 44956.

It is an arithmetic number, because the mean of its divisors is an integer number (16202088).

Almost surely, 2122211121 is an apocalyptic number.

It is an amenable number.

122211121 is a deficient number, since it is larger than the sum of its proper divisors (7405583).

122211121 is an equidigital number, since it uses as much as digits as its factorization.

122211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87191.

The product of its digits is 16, while the sum is 13.

The square root of 122211121 is about 11054.9138847844. The cubic root of 122211121 is about 496.2534921406.

Adding to 122211121 its reverse (121112221), we get a palindrome (243323342).

The spelling of 122211121 in words is "one hundred twenty-two million, two hundred eleven thousand, one hundred twenty-one".

Divisors: 1 23 61 1403 87107 2003461 5313527 122211121