12400044401161 has 2 divisors, whose sum is σ = 12400044401162. Its totient is φ = 12400044401160.

The previous prime is 12400044401149. The next prime is 12400044401237. The reversal of 12400044401161 is 16110444000421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9786454845561 + 2613589555600 = 3128331^2 + 1616660^2 .

It is a cyclic number.

It is not a de Polignac number, because 12400044401161 - 2³¹ = 12397896917513 is a prime.

It is a super-2 number, since 2×12400044401161² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12400044431161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200022200580 + 6200022200581.

It is an arithmetic number, because the mean of its divisors is an integer number (6200022200581).

Almost surely, 2^{12400044401161} is an apocalyptic number.

It is an amenable number.

12400044401161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400044401161 is an equidigital number, since it uses as much as digits as its factorization.

12400044401161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 12400044401161 its reverse (16110444000421), we get a palindrome (28510488401582).

The spelling of 12400044401161 in words is "twelve trillion, four hundred billion, forty-four million, four hundred one thousand, one hundred sixty-one".