121400305 has 12 divisors (see below), whose sum is σ = 157749660. Its totient is φ = 89648832.

The previous prime is 121400299. The next prime is 121400339. The reversal of 121400305 is 503004121.

It can be written as a sum of positive squares in 6 ways, for example, as 56130064 + 65270241 = 7492^2 + 8079^2 .

It is not a de Polignac number, because 121400305 - 2¹³ = 121392113 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 70990 + ... + 72679.

It is an arithmetic number, because the mean of its divisors is an integer number (13145805).

Almost surely, 2^121400305 is an apocalyptic number.

It is an amenable number.

121400305 is a deficient number, since it is larger than the sum of its proper divisors (36349355).

121400305 is a wasteful number, since it uses less digits than its factorization.

121400305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143700 (or 143687 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 121400305 is about 11018.1806574407. The cubic root of 121400305 is about 495.1535829250.

Adding to 121400305 its reverse (503004121), we get a palindrome (624404426).

The spelling of 121400305 in words is "one hundred twenty-one million, four hundred thousand, three hundred five".