121311120321 has 12 divisors (see below), whose sum is σ = 175790609280. Its totient is φ = 80614033080.

The previous prime is 121311120313. The next prime is 121311120323. The reversal of 121311120321 is 123021113121.

121311120321 is a `hidden beast` number, since 1 + 21 + 311 + 12 + 0 + 321 = 666.

It is not a de Polignac number, because 121311120321 - 2³ = 121311120313 is a prime.

It is a super-2 number, since 2×121311120321² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121311120294 and 121311120303.

It is not an unprimeable number, because it can be changed into a prime (121311120323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21667641 + ... + 21673238.

It is an arithmetic number, because the mean of its divisors is an integer number (14649217440).

Almost surely, 2^121311120321 is an apocalyptic number.

It is an amenable number.

121311120321 is a deficient number, since it is larger than the sum of its proper divisors (54479488959).

121311120321 is a wasteful number, since it uses less digits than its factorization.

121311120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43341196 (or 43341193 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121311120321 its reverse (123021113121), we get a palindrome (244332233442).

The spelling of 121311120321 in words is "one hundred twenty-one billion, three hundred eleven million, one hundred twenty thousand, three hundred twenty-one".