121253501 has 2 divisors, whose sum is σ = 121253502. Its totient is φ = 121253500.

The previous prime is 121253491. The next prime is 121253519. The reversal of 121253501 is 105352121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94109401 + 27144100 = 9701^2 + 5210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121253501 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121253521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60626750 + 60626751.

It is an arithmetic number, because the mean of its divisors is an integer number (60626751).

Almost surely, 2^121253501 is an apocalyptic number.

121253501 is the 4925-th centered decagonal number.

It is an amenable number.

121253501 is a deficient number, since it is larger than the sum of its proper divisors (1).

121253501 is an equidigital number, since it uses as much as digits as its factorization.

121253501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 121253501 is about 11011.5167438460. The cubic root of 121253501 is about 494.9539133367.

It can be divided in two parts, 121253 and 501, that multiplied together give a triangular number (60747753 = T₁₁₀₂₂).

The spelling of 121253501 in words is "one hundred twenty-one million, two hundred fifty-three thousand, five hundred one".