1320112421 has 2 divisors, whose sum is σ = 1320112422. Its totient is φ = 1320112420.

The previous prime is 1320112411. The next prime is 1320112471. The reversal of 1320112421 is 1242110231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 757900900 + 562211521 = 27530^2 + 23711^2 .

It is an emirp because it is prime and its reverse (1242110231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320112421 - 2¹⁸ = 1319850277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1320112421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320112411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660056210 + 660056211.

It is an arithmetic number, because the mean of its divisors is an integer number (660056211).

Almost surely, 2^1320112421 is an apocalyptic number.

It is an amenable number.

1320112421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320112421 is an equidigital number, since it uses as much as digits as its factorization.

1320112421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1320112421 is about 36333.3513593227. The cubic root of 1320112421 is about 1096.9924513922.

Adding to 1320112421 its reverse (1242110231), we get a palindrome (2562222652).

The spelling of 1320112421 in words is "one billion, three hundred twenty million, one hundred twelve thousand, four hundred twenty-one".