1320998051 has 2 divisors, whose sum is σ = 1320998052. Its totient is φ = 1320998050.

The previous prime is 1320998017. The next prime is 1320998069. The reversal of 1320998051 is 1508990231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320998051 - 2¹⁴ = 1320981667 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320997996 and 1320998014.

It is not a weakly prime, because it can be changed into another prime (1320998551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660499025 + 660499026.

It is an arithmetic number, because the mean of its divisors is an integer number (660499026).

Almost surely, 2^1320998051 is an apocalyptic number.

1320998051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320998051 is an equidigital number, since it uses as much as digits as its factorization.

1320998051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 1320998051 is about 36345.5368786870. The cubic root of 1320998051 is about 1097.2377113747.

The spelling of 1320998051 in words is "one billion, three hundred twenty million, nine hundred ninety-eight thousand, fifty-one".