Search a number
121210 = 25172331
BaseRepresentation
bin11101100101111010
320011021021
4131211322
512334320
62333054
71013245
oct354572
9204237
10121210
1183081
125a18a
134322b
143225c
1525daa
hex1d97a

121210 has 32 divisors (see below), whose sum is σ = 248832. Its totient is φ = 42240.

The previous prime is 121189. The next prime is 121229. The reversal of 121210 is 12121.

Adding to 121210 its reverse (12121), we get a palindrome (133331).

121210 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 121193 and 121202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3895 + ... + 3925.

It is an arithmetic number, because the mean of its divisors is an integer number (7776).

2121210 is an apocalyptic number.

121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121210 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121210 is a wasteful number, since it uses less digits than its factorization.

121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 121210 is about 348.1522655391. The cubic root of 121210 is about 49.4894716240.

The spelling of 121210 in words is "one hundred twenty-one thousand, two hundred ten", and thus it is an iban number.