121234521 has 8 divisors (see below), whose sum is σ = 166860544. Its totient is φ = 78215760.

The previous prime is 121234517. The next prime is 121234523. The reversal of 121234521 is 125432121.

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

It is not a de Polignac number, because 121234521 - 2² = 121234517 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121234523) 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, 651706 + ... + 651891.

It is an arithmetic number, because the mean of its divisors is an integer number (20857568).

Almost surely, 2^121234521 is an apocalyptic number.

It is an amenable number.

121234521 is a deficient number, since it is larger than the sum of its proper divisors (45626023).

121234521 is a wasteful number, since it uses less digits than its factorization.

121234521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303631.

The product of its digits is 480, while the sum is 21.

The square root of 121234521 is about 11010.6548851556. The cubic root of 121234521 is about 494.9280866859.

Adding to 121234521 its reverse (125432121), we get a palindrome (246666642).

The spelling of 121234521 in words is "one hundred twenty-one million, two hundred thirty-four thousand, five hundred twenty-one".