121356346305 has 16 divisors (see below), whose sum is σ = 194290125120. Its totient is φ = 64683394368.

The previous prime is 121356346303. The next prime is 121356346379. The reversal of 121356346305 is 503643653121.

It is not a de Polignac number, because 121356346305 - 2¹ = 121356346303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121356346303) 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 15 ways as a sum of consecutive naturals, for example, 2474302 + ... + 2522871.

It is an arithmetic number, because the mean of its divisors is an integer number (12143132820).

Almost surely, 2^121356346305 is an apocalyptic number.

121356346305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121356346305 is a deficient number, since it is larger than the sum of its proper divisors (72933778815).

121356346305 is a wasteful number, since it uses less digits than its factorization.

121356346305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998800.

The product of its (nonzero) digits is 194400, while the sum is 39.

Adding to 121356346305 its reverse (503643653121), we get a palindrome (624999999426).

The spelling of 121356346305 in words is "one hundred twenty-one billion, three hundred fifty-six million, three hundred forty-six thousand, three hundred five".