121606571 has 4 divisors (see below), whose sum is σ = 121629552. Its totient is φ = 121583592.

The previous prime is 121606567. The next prime is 121606591. The reversal of 121606571 is 175606121.

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 121606571 - 2² = 121606567 is a prime.

It is a super-2 number, since 2×121606571² = 29576316220756082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121606501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905 + ... + 15621.

It is an arithmetic number, because the mean of its divisors is an integer number (30407388).

Almost surely, 2^121606571 is an apocalyptic number.

121606571 is a deficient number, since it is larger than the sum of its proper divisors (22981).

121606571 is an equidigital number, since it uses as much as digits as its factorization.

121606571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22980.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 121606571 is about 11027.5369416747. The cubic root of 121606571 is about 495.4338555872.

The spelling of 121606571 in words is "one hundred twenty-one million, six hundred six thousand, five hundred seventy-one".