121020803 has 2 divisors, whose sum is σ = 121020804. Its totient is φ = 121020802.

The previous prime is 121020797. The next prime is 121020829. The reversal of 121020803 is 308020121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121020803 - 2⁸ = 121020547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121020863) 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, 60510401 + 60510402.

It is an arithmetic number, because the mean of its divisors is an integer number (60510402).

Almost surely, 2^121020803 is an apocalyptic number.

121020803 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020803 is an equidigital number, since it uses as much as digits as its factorization.

121020803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 121020803 is about 11000.9455502698. The cubic root of 121020803 is about 494.6370880056.

Adding to 121020803 its reverse (308020121), we get a palindrome (429040924).

The spelling of 121020803 in words is "one hundred twenty-one million, twenty thousand, eight hundred three".