121998349946 has 16 divisors (see below), whose sum is σ = 201283532928. Its totient is φ = 55453794220.

The previous prime is 121998349943. The next prime is 121998349981. The reversal of 121998349946 is 649943899121.

It is not an unprimeable number, because it can be changed into a prime (121998349943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22912130 + ... + 22917453.

It is an arithmetic number, because the mean of its divisors is an integer number (12580220808).

Almost surely, 2^121998349946 is an apocalyptic number.

121998349946 is a deficient number, since it is larger than the sum of its proper divisors (79285182982).

121998349946 is an equidigital number, since it uses as much as digits as its factorization.

121998349946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45829618 (or 45829596 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 65.

The spelling of 121998349946 in words is "one hundred twenty-one billion, nine hundred ninety-eight million, three hundred forty-nine thousand, nine hundred forty-six".