121144521 has 8 divisors (see below), whose sum is σ = 164962944. Its totient is φ = 79044560.

The previous prime is 121144493. The next prime is 121144537. The reversal of 121144521 is 125441121.

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 121144521 - 2⁵ = 121144489 is a prime.

It is a super-3 number, since 3×121144521³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121144321) 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, 429450 + ... + 429731.

It is an arithmetic number, because the mean of its divisors is an integer number (20620368).

Almost surely, 2^121144521 is an apocalyptic number.

It is an amenable number.

121144521 is a deficient number, since it is larger than the sum of its proper divisors (43818423).

121144521 is an equidigital number, since it uses as much as digits as its factorization.

121144521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859231.

The product of its digits is 320, while the sum is 21.

The square root of 121144521 is about 11006.5671760091. The cubic root of 121144521 is about 494.8055842984.

Adding to 121144521 its reverse (125441121), we get a palindrome (246585642).

The spelling of 121144521 in words is "one hundred twenty-one million, one hundred forty-four thousand, five hundred twenty-one".