12003111761 has 2 divisors, whose sum is σ = 12003111762. Its totient is φ = 12003111760.

The previous prime is 12003111739. The next prime is 12003111787. The reversal of 12003111761 is 16711130021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9456395536 + 2546716225 = 97244^2 + 50465^2 .

It is a cyclic number.

It is not a de Polignac number, because 12003111761 - 2¹⁰ = 12003110737 is a prime.

It is a super-2 number, since 2×12003111761² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12003111721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001555880 + 6001555881.

It is an arithmetic number, because the mean of its divisors is an integer number (6001555881).

Almost surely, 2^12003111761 is an apocalyptic number.

It is an amenable number.

12003111761 is a deficient number, since it is larger than the sum of its proper divisors (1).

12003111761 is an equidigital number, since it uses as much as digits as its factorization.

12003111761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

Adding to 12003111761 its reverse (16711130021), we get a palindrome (28714241782).

The spelling of 12003111761 in words is "twelve billion, three million, one hundred eleven thousand, seven hundred sixty-one".