121520901 has 8 divisors (see below), whose sum is σ = 163022560. Its totient is φ = 80516592.

The previous prime is 121520887. The next prime is 121520923. The reversal of 121520901 is 109025121.

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

It is not a de Polignac number, because 121520901 - 2⁵ = 121520869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121520101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123766 + ... + 124743.

It is an arithmetic number, because the mean of its divisors is an integer number (20377820).

Almost surely, 2^121520901 is an apocalyptic number.

It is an amenable number.

121520901 is a deficient number, since it is larger than the sum of its proper divisors (41501659).

121520901 is a wasteful number, since it uses less digits than its factorization.

121520901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248675.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 121520901 is about 11023.6518903674. The cubic root of 121520901 is about 495.3174863566.

The spelling of 121520901 in words is "one hundred twenty-one million, five hundred twenty thousand, nine hundred one".