121969901 has 2 divisors, whose sum is σ = 121969902. Its totient is φ = 121969900.

The previous prime is 121969889. The next prime is 121969963. The reversal of 121969901 is 109969121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89775625 + 32194276 = 9475^2 + 5674^2 .

It is a cyclic number.

It is not a de Polignac number, because 121969901 - 2¹⁸ = 121707757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121962901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60984950 + 60984951.

It is an arithmetic number, because the mean of its divisors is an integer number (60984951).

Almost surely, 2^121969901 is an apocalyptic number.

It is an amenable number.

121969901 is a deficient number, since it is larger than the sum of its proper divisors (1).

121969901 is an equidigital number, since it uses as much as digits as its factorization.

121969901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 38.

The square root of 121969901 is about 11043.9984154291. The cubic root of 121969901 is about 495.9267757951.

The spelling of 121969901 in words is "one hundred twenty-one million, nine hundred sixty-nine thousand, nine hundred one".