2123142104656 has 20 divisors (see below), whose sum is σ = 4113638133300. Its totient is φ = 1061558070272.

The previous prime is 2123142104641. The next prime is 2123142104687. The reversal of 2123142104656 is 6564012413212.

It can be written as a sum of positive squares in 2 ways, for example, as 1055879553600 + 1067262551056 = 1027560^2 + 1033084^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613710 + ... + 2150098.

It is an arithmetic number, because the mean of its divisors is an integer number (205681906665).

Almost surely, 2^{2123142104656} is an apocalyptic number.

It is an amenable number.

2123142104656 is a deficient number, since it is larger than the sum of its proper divisors (1990496028644).

2123142104656 is a wasteful number, since it uses less digits than its factorization.

2123142104656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622766 (or 1622760 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 2123142104656 its reverse (6564012413212), we get a palindrome (8687154517868).

The spelling of 2123142104656 in words is "two trillion, one hundred twenty-three billion, one hundred forty-two million, one hundred four thousand, six hundred fifty-six".