12124401109 has 2 divisors, whose sum is σ = 12124401110. Its totient is φ = 12124401108.

The previous prime is 12124401061. The next prime is 12124401119. The reversal of 12124401109 is 90110442121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10985136100 + 1139265009 = 104810^2 + 33753^2 .

It is a cyclic number.

It is not a de Polignac number, because 12124401109 - 2¹¹ = 12124399061 is a prime.

It is a super-2 number, since 2×12124401109² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12124401119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6062200554 + 6062200555.

It is an arithmetic number, because the mean of its divisors is an integer number (6062200555).

Almost surely, 2^12124401109 is an apocalyptic number.

It is an amenable number.

12124401109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12124401109 is an equidigital number, since it uses as much as digits as its factorization.

12124401109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 12124401109 in words is "twelve billion, one hundred twenty-four million, four hundred one thousand, one hundred nine".