2126351606721 has 16 divisors (see below), whose sum is σ = 3033276959040. Its totient is φ = 1320943187520.

The previous prime is 2126351606681. The next prime is 2126351606747. The reversal of 2126351606721 is 1276061536212.

It is not a de Polignac number, because 2126351606721 - 2⁶ = 2126351606657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2126351606221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305770410 + ... + 305777363.

It is an arithmetic number, because the mean of its divisors is an integer number (189579809940).

Almost surely, 2^{2126351606721} is an apocalyptic number.

It is an amenable number.

2126351606721 is a deficient number, since it is larger than the sum of its proper divisors (906925352319).

2126351606721 is a wasteful number, since it uses less digits than its factorization.

2126351606721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611547856.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 2126351606721 in words is "two trillion, one hundred twenty-six billion, three hundred fifty-one million, six hundred six thousand, seven hundred twenty-one".