121254521 has 2 divisors, whose sum is σ = 121254522. Its totient is φ = 121254520.

The previous prime is 121254503. The next prime is 121254541. The reversal of 121254521 is 125452121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117397225 + 3857296 = 10835^2 + 1964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121254521 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (121254541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60627260 + 60627261.

It is an arithmetic number, because the mean of its divisors is an integer number (60627261).

Almost surely, 2^121254521 is an apocalyptic number.

It is an amenable number.

121254521 is a deficient number, since it is larger than the sum of its proper divisors (1).

121254521 is an equidigital number, since it uses as much as digits as its factorization.

121254521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 800, while the sum is 23.

The square root of 121254521 is about 11011.5630588940. The cubic root of 121254521 is about 494.9553012048.

The spelling of 121254521 in words is "one hundred twenty-one million, two hundred fifty-four thousand, five hundred twenty-one".