2012344403981 has 2 divisors, whose sum is σ = 2012344403982. Its totient is φ = 2012344403980.

The previous prime is 2012344403977. The next prime is 2012344404013. The reversal of 2012344403981 is 1893044432102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1169144812900 + 843199591081 = 1081270^2 + 918259^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012344403981 - 2² = 2012344403977 is a prime.

It is a super-2 number, since 2×2012344403981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012344403921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006172201990 + 1006172201991.

It is an arithmetic number, because the mean of its divisors is an integer number (1006172201991).

Almost surely, 2^{2012344403981} is an apocalyptic number.

It is an amenable number.

2012344403981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012344403981 is an equidigital number, since it uses as much as digits as its factorization.

2012344403981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 2012344403981 in words is "two trillion, twelve billion, three hundred forty-four million, four hundred three thousand, nine hundred eighty-one".