11231320073 has 2 divisors, whose sum is σ = 11231320074. Its totient is φ = 11231320072.

The previous prime is 11231320043. The next prime is 11231320157. The reversal of 11231320073 is 37002313211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11056101904 + 175218169 = 105148^2 + 13237^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231320073 - 2¹⁰ = 11231319049 is a prime.

It is a super-2 number, since 2×11231320073² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11231320043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615660036 + 5615660037.

It is an arithmetic number, because the mean of its divisors is an integer number (5615660037).

Almost surely, 2^11231320073 is an apocalyptic number.

It is an amenable number.

11231320073 is a deficient number, since it is larger than the sum of its proper divisors (1).

11231320073 is an equidigital number, since it uses as much as digits as its factorization.

11231320073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

Adding to 11231320073 its reverse (37002313211), we get a palindrome (48233633284).

The spelling of 11231320073 in words is "eleven billion, two hundred thirty-one million, three hundred twenty thousand, seventy-three".