2012010013721 has 2 divisors, whose sum is σ = 2012010013722. Its totient is φ = 2012010013720.

The previous prime is 2012010013669. The next prime is 2012010013753. The reversal of 2012010013721 is 1273100102102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1410975744025 + 601034269696 = 1187845^2 + 775264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012010013721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012010013693 and 2012010013702.

It is not a weakly prime, because it can be changed into another prime (2012010013771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006005006860 + 1006005006861.

It is an arithmetic number, because the mean of its divisors is an integer number (1006005006861).

Almost surely, 2^{2012010013721} is an apocalyptic number.

It is an amenable number.

2012010013721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012010013721 is an equidigital number, since it uses as much as digits as its factorization.

2012010013721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 2012010013721 its reverse (1273100102102), we get a palindrome (3285110115823).

The spelling of 2012010013721 in words is "two trillion, twelve billion, ten million, thirteen thousand, seven hundred twenty-one".