2141445663521 has 2 divisors, whose sum is σ = 2141445663522. Its totient is φ = 2141445663520.

The previous prime is 2141445663493. The next prime is 2141445663527. The reversal of 2141445663521 is 1253665441412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1246652639296 + 894793024225 = 1116536^2 + 945935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2141445663521 is a prime.

It is not a weakly prime, because it can be changed into another prime (2141445663527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070722831760 + 1070722831761.

It is an arithmetic number, because the mean of its divisors is an integer number (1070722831761).

Almost surely, 2^{2141445663521} is an apocalyptic number.

It is an amenable number.

2141445663521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2141445663521 is an equidigital number, since it uses as much as digits as its factorization.

2141445663521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 44.

The spelling of 2141445663521 in words is "two trillion, one hundred forty-one billion, four hundred forty-five million, six hundred sixty-three thousand, five hundred twenty-one".