121986001 has 2 divisors, whose sum is σ = 121986002. Its totient is φ = 121986000.

The previous prime is 121985987. The next prime is 121986037. The reversal of 121986001 is 100689121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81993025 + 39992976 = 9055^2 + 6324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121986001 is a prime.

It is not a weakly prime, because it can be changed into another prime (121986041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60993000 + 60993001.

It is an arithmetic number, because the mean of its divisors is an integer number (60993001).

Almost surely, 2^121986001 is an apocalyptic number.

It is an amenable number.

121986001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121986001 is an equidigital number, since it uses as much as digits as its factorization.

121986001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 121986001 is about 11044.7272940530. The cubic root of 121986001 is about 495.9485955767.

The spelling of 121986001 in words is "one hundred twenty-one million, nine hundred eighty-six thousand, one".