121045521 has 8 divisors (see below), whose sum is σ = 164129760. Its totient is φ = 79329152.

The previous prime is 121045517. The next prime is 121045541. The reversal of 121045521 is 125540121.

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 121045521 - 2² = 121045517 is a prime.

It is a super-2 number, since 2×121045521² = 29304036308322882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121045501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341760 + ... + 342113.

It is an arithmetic number, because the mean of its divisors is an integer number (20516220).

Almost surely, 2^121045521 is an apocalyptic number.

It is an amenable number.

121045521 is a deficient number, since it is larger than the sum of its proper divisors (43084239).

121045521 is an equidigital number, since it uses as much as digits as its factorization.

121045521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683935.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 121045521 is about 11002.0689417945. The cubic root of 121045521 is about 494.6707615750.

Adding to 121045521 its reverse (125540121), we get a palindrome (246585642).

The spelling of 121045521 in words is "one hundred twenty-one million, forty-five thousand, five hundred twenty-one".