121423513 has 8 divisors (see below), whose sum is σ = 125239680. Its totient is φ = 117658800.

The previous prime is 121423499. The next prime is 121423517. The reversal of 121423513 is 315324121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121423513 - 2⁵ = 121423481 is a prime.

It is a super-2 number, since 2×121423513² = 29487339018522338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121423517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8043 + ... + 17536.

It is an arithmetic number, because the mean of its divisors is an integer number (15654960).

Almost surely, 2^121423513 is an apocalyptic number.

It is an amenable number.

121423513 is a deficient number, since it is larger than the sum of its proper divisors (3816167).

121423513 is a wasteful number, since it uses less digits than its factorization.

121423513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25727.

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

The square root of 121423513 is about 11019.2337755399. The cubic root of 121423513 is about 495.1851336205.

Adding to 121423513 its reverse (315324121), we get a palindrome (436747634).

The spelling of 121423513 in words is "one hundred twenty-one million, four hundred twenty-three thousand, five hundred thirteen".