1320262121 has 4 divisors (see below), whose sum is σ = 1320512592. Its totient is φ = 1320011652.

The previous prime is 1320262103. The next prime is 1320262133. The reversal of 1320262121 is 1212620231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1320262121 - 2¹⁰ = 1320261097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320262093 and 1320262102.

It is not an unprimeable number, because it can be changed into a prime (1320268121) 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 in 3 ways as a sum of consecutive naturals, for example, 117155 + ... + 127928.

It is an arithmetic number, because the mean of its divisors is an integer number (330128148).

Almost surely, 2^1320262121 is an apocalyptic number.

It is an amenable number.

1320262121 is a deficient number, since it is larger than the sum of its proper divisors (250471).

1320262121 is an equidigital number, since it uses as much as digits as its factorization.

1320262121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250470.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1320262121 is about 36335.4113916438. The cubic root of 1320262121 is about 1097.0339159323.

Adding to 1320262121 its reverse (1212620231), we get a palindrome (2532882352).

The spelling of 1320262121 in words is "one billion, three hundred twenty million, two hundred sixty-two thousand, one hundred twenty-one".