121886851 has 2 divisors, whose sum is σ = 121886852. Its totient is φ = 121886850.

The previous prime is 121886837. The next prime is 121886879. The reversal of 121886851 is 158688121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121886851 - 2¹¹ = 121884803 is a prime.

It is not a weakly prime, because it can be changed into another prime (121886351) 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 as a sum of consecutive naturals, namely, 60943425 + 60943426.

It is an arithmetic number, because the mean of its divisors is an integer number (60943426).

Almost surely, 2^121886851 is an apocalyptic number.

121886851 is a deficient number, since it is larger than the sum of its proper divisors (1).

121886851 is an equidigital number, since it uses as much as digits as its factorization.

121886851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 40.

The square root of 121886851 is about 11040.2378144676. The cubic root of 121886851 is about 495.8141904496.

The spelling of 121886851 in words is "one hundred twenty-one million, eight hundred eighty-six thousand, eight hundred fifty-one".