121532091 has 4 divisors (see below), whose sum is σ = 162042792. Its totient is φ = 81021392.

The previous prime is 121532071. The next prime is 121532119. The reversal of 121532091 is 190235121.

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

It is a cyclic number.

It is not a de Polignac number, because 121532091 - 2¹⁷ = 121401019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121532041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20255346 + ... + 20255351.

It is an arithmetic number, because the mean of its divisors is an integer number (40510698).

Almost surely, 2^121532091 is an apocalyptic number.

121532091 is a deficient number, since it is larger than the sum of its proper divisors (40510701).

121532091 is an equidigital number, since it uses as much as digits as its factorization.

121532091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40510700.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 121532091 is about 11024.1594237384. The cubic root of 121532091 is about 495.3326893176.

The spelling of 121532091 in words is "one hundred twenty-one million, five hundred thirty-two thousand, ninety-one".