121120261 has 2 divisors, whose sum is σ = 121120262. Its totient is φ = 121120260.

The previous prime is 121120253. The next prime is 121120297. The reversal of 121120261 is 162021121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103530625 + 17589636 = 10175^2 + 4194^2 .

It is a cyclic number.

It is not a de Polignac number, because 121120261 - 2³ = 121120253 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121120061) by changing a digit.

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 as a sum of consecutive naturals, namely, 60560130 + 60560131.

It is an arithmetic number, because the mean of its divisors is an integer number (60560131).

Almost surely, 2^121120261 is an apocalyptic number.

It is an amenable number.

121120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

121120261 is an equidigital number, since it uses as much as digits as its factorization.

121120261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 121120261 is about 11005.4650515096. The cubic root of 121120261 is about 494.7725527182.

Adding to 121120261 its reverse (162021121), we get a palindrome (283141382).

The spelling of 121120261 in words is "one hundred twenty-one million, one hundred twenty thousand, two hundred sixty-one".