121681867 has 2 divisors, whose sum is σ = 121681868. Its totient is φ = 121681866.

The previous prime is 121681843. The next prime is 121681877. The reversal of 121681867 is 768186121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121681867 - 2⁷ = 121681739 is a prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (121681817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60840933 + 60840934.

It is an arithmetic number, because the mean of its divisors is an integer number (60840934).

Almost surely, 2^121681867 is an apocalyptic number.

121681867 is a deficient number, since it is larger than the sum of its proper divisors (1).

121681867 is an equidigital number, since it uses as much as digits as its factorization.

121681867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 40.

The square root of 121681867 is about 11030.9504123625. The cubic root of 121681867 is about 495.5360882507.

The spelling of 121681867 in words is "one hundred twenty-one million, six hundred eighty-one thousand, eight hundred sixty-seven".