12031322477 has 2 divisors, whose sum is σ = 12031322478. Its totient is φ = 12031322476.

The previous prime is 12031322473. The next prime is 12031322483. The reversal of 12031322477 is 77422313021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7446136681 + 4585185796 = 86291^2 + 67714^2 .

It is a cyclic number.

It is not a de Polignac number, because 12031322477 - 2² = 12031322473 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12031322473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015661238 + 6015661239.

It is an arithmetic number, because the mean of its divisors is an integer number (6015661239).

Almost surely, 2^12031322477 is an apocalyptic number.

It is an amenable number.

12031322477 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031322477 is an equidigital number, since it uses as much as digits as its factorization.

12031322477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 32.

Adding to 12031322477 its reverse (77422313021), we get a palindrome (89453635498).

The spelling of 12031322477 in words is "twelve billion, thirty-one million, three hundred twenty-two thousand, four hundred seventy-seven".