121320126 has 32 divisors (see below), whose sum is σ = 285461280. Its totient is φ = 38060928.

The previous prime is 121320103. The next prime is 121320163. The reversal of 121320126 is 621023121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121320099 and 121320108.

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 15 ways as a sum of consecutive naturals, for example, 65161 + ... + 66996.

It is an arithmetic number, because the mean of its divisors is an integer number (8920665).

Almost surely, 2^121320126 is an apocalyptic number.

121320126 is an abundant number, since it is smaller than the sum of its proper divisors (164141154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121320126 is a wasteful number, since it uses less digits than its factorization.

121320126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132185 (or 132179 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 121320126 is about 11014.5415701245. The cubic root of 121320126 is about 495.0445506275.

Adding to 121320126 its reverse (621023121), we get a palindrome (742343247).

The spelling of 121320126 in words is "one hundred twenty-one million, three hundred twenty thousand, one hundred twenty-six".