121257061 has 2 divisors, whose sum is σ = 121257062. Its totient is φ = 121257060.

The previous prime is 121257047. The next prime is 121257079. The reversal of 121257061 is 160752121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62504836 + 58752225 = 7906^2 + 7665^2 .

It is an emirp because it is prime and its reverse (160752121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121257061 - 2⁹ = 121256549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121257011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60628530 + 60628531.

It is an arithmetic number, because the mean of its divisors is an integer number (60628531).

Almost surely, 2^121257061 is an apocalyptic number.

It is an amenable number.

121257061 is a deficient number, since it is larger than the sum of its proper divisors (1).

121257061 is an equidigital number, since it uses as much as digits as its factorization.

121257061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 121257061 is about 11011.6783915986. The cubic root of 121257061 is about 494.9587572345.

The spelling of 121257061 in words is "one hundred twenty-one million, two hundred fifty-seven thousand, sixty-one".