121434521 has 4 divisors (see below), whose sum is σ = 130775652. Its totient is φ = 112093392.

The previous prime is 121434517. The next prime is 121434527. The reversal of 121434521 is 125434121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74580496 + 46854025 = 8636^2 + 6845^2 .

It is a cyclic number.

It is not a de Polignac number, because 121434521 - 2² = 121434517 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 (121434527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4670546 + ... + 4670571.

It is an arithmetic number, because the mean of its divisors is an integer number (32693913).

Almost surely, 2^121434521 is an apocalyptic number.

It is an amenable number.

121434521 is a deficient number, since it is larger than the sum of its proper divisors (9341131).

121434521 is an equidigital number, since it uses as much as digits as its factorization.

121434521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9341130.

The product of its digits is 960, while the sum is 23.

The square root of 121434521 is about 11019.7332544849. The cubic root of 121434521 is about 495.2000973155.

Adding to 121434521 its reverse (125434121), we get a palindrome (246868642).

The spelling of 121434521 in words is "one hundred twenty-one million, four hundred thirty-four thousand, five hundred twenty-one".