121151321 has 2 divisors, whose sum is σ = 121151322. Its totient is φ = 121151320.

The previous prime is 121151309. The next prime is 121151341. The reversal of 121151321 is 123151121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121000000 + 151321 = 11000^2 + 389^2 .

It is an emirp because it is prime and its reverse (123151121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121151321 - 2¹⁰ = 121150297 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121151321.

It is not a weakly prime, because it can be changed into another prime (121151341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60575660 + 60575661.

It is an arithmetic number, because the mean of its divisors is an integer number (60575661).

Almost surely, 2^121151321 is an apocalyptic number.

It is an amenable number.

121151321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121151321 is an equidigital number, since it uses as much as digits as its factorization.

121151321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60, while the sum is 17.

The square root of 121151321 is about 11006.8760781613. The cubic root of 121151321 is about 494.8148421528.

It can be divided in two parts, 121 and 151321, that multiplied together give a square (18309841 = 4279²).

The spelling of 121151321 in words is "one hundred twenty-one million, one hundred fifty-one thousand, three hundred twenty-one".