121438523 has 2 divisors, whose sum is σ = 121438524. Its totient is φ = 121438522.

The previous prime is 121438517. The next prime is 121438547. The reversal of 121438523 is 325834121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121438523 - 2¹⁰ = 121437499 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 (121431523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60719261 + 60719262.

It is an arithmetic number, because the mean of its divisors is an integer number (60719262).

Almost surely, 2^121438523 is an apocalyptic number.

121438523 is a deficient number, since it is larger than the sum of its proper divisors (1).

121438523 is an equidigital number, since it uses as much as digits as its factorization.

121438523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 121438523 is about 11019.9148363315. The cubic root of 121438523 is about 495.2055371992.

The spelling of 121438523 in words is "one hundred twenty-one million, four hundred thirty-eight thousand, five hundred twenty-three".