12220007773 has 4 divisors (see below), whose sum is σ = 12221159580. Its totient is φ = 12218855968.

The previous prime is 12220007753. The next prime is 12220007777. The reversal of 12220007773 is 37770002221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11673289849 + 546717924 = 108043^2 + 23382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12220007773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220007777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559840 + ... + 581257.

It is an arithmetic number, because the mean of its divisors is an integer number (3055289895).

Almost surely, 2^12220007773 is an apocalyptic number.

It is an amenable number.

12220007773 is a deficient number, since it is larger than the sum of its proper divisors (1151807).

12220007773 is a wasteful number, since it uses less digits than its factorization.

12220007773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151806.

The product of its (nonzero) digits is 8232, while the sum is 31.

Adding to 12220007773 its reverse (37770002221), we get a palindrome (49990009994).

The spelling of 12220007773 in words is "twelve billion, two hundred twenty million, seven thousand, seven hundred seventy-three".