121220013321 has 32 divisors (see below), whose sum is σ = 196330867200. Its totient is φ = 73309274640.

The previous prime is 121220013307. The next prime is 121220013337. The reversal of 121220013321 is 123310022121.

121220013321 is a `hidden beast` number, since 121 + 220 + 0 + 1 + 3 + 321 = 666.

It is not a de Polignac number, because 121220013321 - 2¹¹ = 121220011273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121220013294 and 121220013303.

It is not an unprimeable number, because it can be changed into a prime (121220013121) 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 31 ways as a sum of consecutive naturals, for example, 298291 + ... + 575688.

It is an arithmetic number, because the mean of its divisors is an integer number (6135339600).

Almost surely, 2^121220013321 is an apocalyptic number.

121220013321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121220013321 is a deficient number, since it is larger than the sum of its proper divisors (75110853879).

121220013321 is a wasteful number, since it uses less digits than its factorization.

121220013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874466 (or 874460 counting only the distinct ones).

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

Adding to 121220013321 its reverse (123310022121), we get a palindrome (244530035442).

The spelling of 121220013321 in words is "one hundred twenty-one billion, two hundred twenty million, thirteen thousand, three hundred twenty-one".