2688842130421 has 2 divisors, whose sum is σ = 2688842130422. Its totient is φ = 2688842130420.

The previous prime is 2688842130419. The next prime is 2688842130449. The reversal of 2688842130421 is 1240312488862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1817335863396 + 871506267025 = 1348086^2 + 933545^2 .

It is a cyclic number.

It is not a de Polignac number, because 2688842130421 - 2¹ = 2688842130419 is a prime.

Together with 2688842130419, 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 (2688842133421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344421065210 + 1344421065211.

It is an arithmetic number, because the mean of its divisors is an integer number (1344421065211).

Almost surely, 2^{2688842130421} is an apocalyptic number.

It is an amenable number.

2688842130421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2688842130421 is an equidigital number, since it uses as much as digits as its factorization.

2688842130421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1179648, while the sum is 49.

The spelling of 2688842130421 in words is "two trillion, six hundred eighty-eight billion, eight hundred forty-two million, one hundred thirty thousand, four hundred twenty-one".