121052541509 has 2 divisors, whose sum is σ = 121052541510. Its totient is φ = 121052541508.

The previous prime is 121052541487. The next prime is 121052541521. The reversal of 121052541509 is 905145250121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116683728100 + 4368813409 = 341590^2 + 66097^2 .

It is a cyclic number.

It is not a de Polignac number, because 121052541509 - 2²⁴ = 121035764293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121052541569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60526270754 + 60526270755.

It is an arithmetic number, because the mean of its divisors is an integer number (60526270755).

Almost surely, 2^121052541509 is an apocalyptic number.

It is an amenable number.

121052541509 is a deficient number, since it is larger than the sum of its proper divisors (1).

121052541509 is an equidigital number, since it uses as much as digits as its factorization.

121052541509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 121052541509 in words is "one hundred twenty-one billion, fifty-two million, five hundred forty-one thousand, five hundred nine".