121253521 has 2 divisors, whose sum is σ = 121253522. Its totient is φ = 121253520.

The previous prime is 121253519. The next prime is 121253527. The reversal of 121253521 is 125352121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99500625 + 21752896 = 9975^2 + 4664^2 .

It is an emirp because it is prime and its reverse (125352121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121253521 - 2¹ = 121253519 is a prime.

Together with 121253519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121253492 and 121253501.

It is not a weakly prime, because it can be changed into another prime (121253527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60626760 + 60626761.

It is an arithmetic number, because the mean of its divisors is an integer number (60626761).

Almost surely, 2^121253521 is an apocalyptic number.

It is an amenable number.

121253521 is a deficient number, since it is larger than the sum of its proper divisors (1).

121253521 is an equidigital number, since it uses as much as digits as its factorization.

121253521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 22.

The square root of 121253521 is about 11011.5176519860. The cubic root of 121253521 is about 494.9539405499.

The spelling of 121253521 in words is "one hundred twenty-one million, two hundred fifty-three thousand, five hundred twenty-one".