121120020999 has 6 divisors (see below), whose sum is σ = 174951141456. Its totient is φ = 80746680660.

The previous prime is 121120020971. The next prime is 121120021027. The reversal of 121120020999 is 999020021121.

It is an interprime number because it is at equal distance from previous prime (121120020971) and next prime (121120021027).

It is not a de Polignac number, because 121120020999 - 2⁸ = 121120020743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120020929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6728890047 + ... + 6728890064.

It is an arithmetic number, because the mean of its divisors is an integer number (29158523576).

Almost surely, 2^121120020999 is an apocalyptic number.

121120020999 is a deficient number, since it is larger than the sum of its proper divisors (53831120457).

121120020999 is a wasteful number, since it uses less digits than its factorization.

121120020999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13457780117 (or 13457780114 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 121120020999 in words is "one hundred twenty-one billion, one hundred twenty million, twenty thousand, nine hundred ninety-nine".