12421022077 has 2 divisors, whose sum is σ = 12421022078. Its totient is φ = 12421022076.

The previous prime is 12421022027. The next prime is 12421022099. The reversal of 12421022077 is 77022012421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10488012921 + 1933009156 = 102411^2 + 43966^2 .

It is a cyclic number.

It is not a de Polignac number, because 12421022077 - 2²³ = 12412633469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12421022027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210511038 + 6210511039.

It is an arithmetic number, because the mean of its divisors is an integer number (6210511039).

Almost surely, 2^12421022077 is an apocalyptic number.

It is an amenable number.

12421022077 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421022077 is an equidigital number, since it uses as much as digits as its factorization.

12421022077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 28.

Adding to 12421022077 its reverse (77022012421), we get a palindrome (89443034498).

The spelling of 12421022077 in words is "twelve billion, four hundred twenty-one million, twenty-two thousand, seventy-seven".