121771506 has 16 divisors (see below), whose sum is σ = 245296800. Its totient is φ = 40298208.

The previous prime is 121771487. The next prime is 121771511. The reversal of 121771506 is 605177121.

It is an unprimeable number.

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, 72171 + ... + 73838.

It is an arithmetic number, because the mean of its divisors is an integer number (15331050).

Almost surely, 2^121771506 is an apocalyptic number.

121771506 is an abundant number, since it is smaller than the sum of its proper divisors (123525294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121771506 is a wasteful number, since it uses less digits than its factorization.

121771506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146153.

The product of its (nonzero) digits is 2940, while the sum is 30.

The square root of 121771506 is about 11035.0127322083. The cubic root of 121771506 is about 495.6577400562.

The spelling of 121771506 in words is "one hundred twenty-one million, seven hundred seventy-one thousand, five hundred six".