121206523 has 2 divisors, whose sum is σ = 121206524. Its totient is φ = 121206522.

The previous prime is 121206517. The next prime is 121206563. The reversal of 121206523 is 325602121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121206523 - 2⁹ = 121206011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121206494 and 121206503.

It is not a weakly prime, because it can be changed into another prime (121206563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60603261 + 60603262.

It is an arithmetic number, because the mean of its divisors is an integer number (60603262).

Almost surely, 2^121206523 is an apocalyptic number.

121206523 is a deficient number, since it is larger than the sum of its proper divisors (1).

121206523 is an equidigital number, since it uses as much as digits as its factorization.

121206523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 121206523 is about 11009.3834068943. The cubic root of 121206523 is about 494.8899840528.

Adding to 121206523 its reverse (325602121), we get a palindrome (446808644).

The spelling of 121206523 in words is "one hundred twenty-one million, two hundred six thousand, five hundred twenty-three".