2145341125621 has 2 divisors, whose sum is σ = 2145341125622. Its totient is φ = 2145341125620.

The previous prime is 2145341125619. The next prime is 2145341125633. The reversal of 2145341125621 is 1265211435412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2086034264721 + 59306860900 = 1444311^2 + 243530^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145341125621 - 2¹ = 2145341125619 is a prime.

Together with 2145341125619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145341125661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072670562810 + 1072670562811.

It is an arithmetic number, because the mean of its divisors is an integer number (1072670562811).

Almost surely, 2^{2145341125621} is an apocalyptic number.

It is an amenable number.

2145341125621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145341125621 is an equidigital number, since it uses as much as digits as its factorization.

2145341125621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 37.

The spelling of 2145341125621 in words is "two trillion, one hundred forty-five billion, three hundred forty-one million, one hundred twenty-five thousand, six hundred twenty-one".