121132321 has 2 divisors, whose sum is σ = 121132322. Its totient is φ = 121132320.

The previous prime is 121132307. The next prime is 121132367. The reversal of 121132321 is 123231121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83174400 + 37957921 = 9120^2 + 6161^2 .

It is a cyclic number.

It is not a de Polignac number, because 121132321 - 2⁵ = 121132289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121132295 and 121132304.

It is not a weakly prime, because it can be changed into another prime (121132721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60566160 + 60566161.

It is an arithmetic number, because the mean of its divisors is an integer number (60566161).

Almost surely, 2^121132321 is an apocalyptic number.

It is an amenable number.

121132321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121132321 is an equidigital number, since it uses as much as digits as its factorization.

121132321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 16.

The square root of 121132321 is about 11006.0129474756. The cubic root of 121132321 is about 494.7889737500.

Adding to 121132321 its reverse (123231121), we get a palindrome (244363442).

The spelling of 121132321 in words is "one hundred twenty-one million, one hundred thirty-two thousand, three hundred twenty-one".