1121407321 has 2 divisors, whose sum is σ = 1121407322. Its totient is φ = 1121407320.

The previous prime is 1121407319. The next prime is 1121407373. The reversal of 1121407321 is 1237041211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1065696025 + 55711296 = 32645^2 + 7464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121407321 - 2¹ = 1121407319 is a prime.

Together with 1121407319, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1121407292 and 1121407301.

It is not a weakly prime, because it can be changed into another prime (1121437321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560703660 + 560703661.

It is an arithmetic number, because the mean of its divisors is an integer number (560703661).

Almost surely, 2^1121407321 is an apocalyptic number.

It is an amenable number.

1121407321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121407321 is an equidigital number, since it uses as much as digits as its factorization.

1121407321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1121407321 is about 33487.4203395842. The cubic root of 1121407321 is about 1038.9336089066.

Adding to 1121407321 its reverse (1237041211), we get a palindrome (2358448532).

The spelling of 1121407321 in words is "one billion, one hundred twenty-one million, four hundred seven thousand, three hundred twenty-one".