121398904455 has 8 divisors (see below), whose sum is σ = 194238247152. Its totient is φ = 64746082368.

The previous prime is 121398904441. The next prime is 121398904499. The reversal of 121398904455 is 554409893121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121398904455 - 2⁴ = 121398904439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121398904398 and 121398904407.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4046630134 + ... + 4046630163.

It is an arithmetic number, because the mean of its divisors is an integer number (24279780894).

Almost surely, 2^121398904455 is an apocalyptic number.

121398904455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121398904455 is a deficient number, since it is larger than the sum of its proper divisors (72839342697).

121398904455 is an equidigital number, since it uses as much as digits as its factorization.

121398904455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093260305.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 121398904455 in words is "one hundred twenty-one billion, three hundred ninety-eight million, nine hundred four thousand, four hundred fifty-five".