121205273 has 12 divisors (see below), whose sum is σ = 142583220. Its totient is φ = 102719232.

The previous prime is 121205233. The next prime is 121205309. The reversal of 121205273 is 372502121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11102224 + 110103049 = 3332^2 + 10493^2 .

It is not a de Polignac number, because 121205273 - 2²⁶ = 54096409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121205233) 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, 9536 + ... + 18257.

It is an arithmetic number, because the mean of its divisors is an integer number (11881935).

Almost surely, 2^121205273 is an apocalyptic number.

It is an amenable number.

121205273 is a deficient number, since it is larger than the sum of its proper divisors (21377947).

121205273 is an equidigital number, since it uses as much as digits as its factorization.

121205273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27896 (or 27889 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 121205273 is about 11009.3266369928. The cubic root of 121205273 is about 494.8882827841. Note that the first 3 decimals are identical.

Adding to 121205273 its reverse (372502121), we get a palindrome (493707394).

The spelling of 121205273 in words is "one hundred twenty-one million, two hundred five thousand, two hundred seventy-three".