121320120321 has 24 divisors (see below), whose sum is σ = 179355084480. Its totient is φ = 78981721056.

The previous prime is 121320120301. The next prime is 121320120323. The reversal of 121320120321 is 123021023121.

121320120321 is a `hidden beast` number, since 1 + 2 + 1 + 320 + 1 + 20 + 321 = 666.

It is not a de Polignac number, because 121320120321 - 2³¹ = 119172636673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121320120294 and 121320120303.

It is not an unprimeable number, because it can be changed into a prime (121320120323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1855260 + ... + 1919538.

It is an arithmetic number, because the mean of its divisors is an integer number (7473128520).

Almost surely, 2^121320120321 is an apocalyptic number.

It is an amenable number.

121320120321 is a deficient number, since it is larger than the sum of its proper divisors (58034964159).

121320120321 is a wasteful number, since it uses less digits than its factorization.

121320120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69205 (or 69202 counting only the distinct ones).

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

Adding to 121320120321 its reverse (123021023121), we get a palindrome (244341143442).

The spelling of 121320120321 in words is "one hundred twenty-one billion, three hundred twenty million, one hundred twenty thousand, three hundred twenty-one".