121877156 has 12 divisors (see below), whose sum is σ = 213375792. Its totient is φ = 60912648.

The previous prime is 121877143. The next prime is 121877177. The reversal of 121877156 is 651778121.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 7391 + ... + 17273.

It is an arithmetic number, because the mean of its divisors is an integer number (17781316).

Almost surely, 2^121877156 is an apocalyptic number.

It is an amenable number.

121877156 is a deficient number, since it is larger than the sum of its proper divisors (91498636).

121877156 is a wasteful number, since it uses less digits than its factorization.

121877156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12970 (or 12968 counting only the distinct ones).

The product of its digits is 23520, while the sum is 38.

The square root of 121877156 is about 11039.7987300494. The cubic root of 121877156 is about 495.8010442516.

The spelling of 121877156 in words is "one hundred twenty-one million, eight hundred seventy-seven thousand, one hundred fifty-six".