121423505 has 16 divisors (see below), whose sum is σ = 167184000. Its totient is φ = 82931712.

The previous prime is 121423499. The next prime is 121423517. The reversal of 121423505 is 505324121.

It is a cyclic number.

It is not a de Polignac number, because 121423505 - 2¹⁰ = 121422481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2246 + ... + 15744.

It is an arithmetic number, because the mean of its divisors is an integer number (10449000).

Almost surely, 2^121423505 is an apocalyptic number.

It is an amenable number.

121423505 is a deficient number, since it is larger than the sum of its proper divisors (45760495).

121423505 is a wasteful number, since it uses less digits than its factorization.

121423505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13768.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 121423505 is about 11019.2334125383. The cubic root of 121423505 is about 495.1851227454.

Adding to 121423505 its reverse (505324121), we get a palindrome (626747626).

The spelling of 121423505 in words is "one hundred twenty-one million, four hundred twenty-three thousand, five hundred five".