2121027430686 has 32 divisors (see below), whose sum is σ = 4306607585280. Its totient is φ = 696328037856.

The previous prime is 2121027430649. The next prime is 2121027430693. The reversal of 2121027430686 is 6860347201212.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9600846 + ... + 9819281.

It is an arithmetic number, because the mean of its divisors is an integer number (134581487040).

Almost surely, 2^{2121027430686} is an apocalyptic number.

2121027430686 is an abundant number, since it is smaller than the sum of its proper divisors (2185580154594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121027430686 is a wasteful number, since it uses less digits than its factorization.

2121027430686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19420408.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 2121027430686 in words is "two trillion, one hundred twenty-one billion, twenty-seven million, four hundred thirty thousand, six hundred eighty-six".