2123050463561 has 4 divisors (see below), whose sum is σ = 2123058351300. Its totient is φ = 2123042575824.

The previous prime is 2123050463551. The next prime is 2123050463623. The reversal of 2123050463561 is 1653640503212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 665090811961 + 1457959651600 = 815531^2 + 1207460^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123050463561 - 2¹⁸ = 2123050201417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123050463531) 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 in 3 ways as a sum of consecutive naturals, for example, 3525326 + ... + 4083383.

It is an arithmetic number, because the mean of its divisors is an integer number (530764587825).

Almost surely, 2^{2123050463561} is an apocalyptic number.

It is an amenable number.

2123050463561 is a deficient number, since it is larger than the sum of its proper divisors (7887739).

2123050463561 is an equidigital number, since it uses as much as digits as its factorization.

2123050463561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7887738.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 2123050463561 its reverse (1653640503212), we get a palindrome (3776690966773).

The spelling of 2123050463561 in words is "two trillion, one hundred twenty-three billion, fifty million, four hundred sixty-three thousand, five hundred sixty-one".