2127085522821 has 144 divisors (see below), whose sum is σ = 3917882779200. Its totient is φ = 1103666328576.

The previous prime is 2127085522811. The next prime is 2127085522847. The reversal of 2127085522821 is 1282255807212.

2127085522821 is a `hidden beast` number, since 2 + 1 + 2 + 70 + 8 + 552 + 2 + 8 + 21 = 666.

It is not a de Polignac number, because 2127085522821 - 2⁷ = 2127085522693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2127085522811) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 351988626 + ... + 351994668.

It is an arithmetic number, because the mean of its divisors is an integer number (27207519300).

Almost surely, 2^{2127085522821} is an apocalyptic number.

2127085522821 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2127085522821 is a deficient number, since it is larger than the sum of its proper divisors (1790797256379).

2127085522821 is a wasteful number, since it uses less digits than its factorization.

2127085522821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7728 (or 7718 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The spelling of 2127085522821 in words is "two trillion, one hundred twenty-seven billion, eighty-five million, five hundred twenty-two thousand, eight hundred twenty-one".