2121640206410 has 16 divisors (see below), whose sum is σ = 3819929906016. Its totient is φ = 848438852688.

The previous prime is 2121640206409. The next prime is 2121640206443. The reversal of 2121640206410 is 146020461212.

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 7 ways as a sum of consecutive naturals, for example, 27112712 + ... + 27190851.

It is an arithmetic number, because the mean of its divisors is an integer number (238745619126).

Almost surely, 2^{2121640206410} is an apocalyptic number.

2121640206410 is a deficient number, since it is larger than the sum of its proper divisors (1698289699606).

2121640206410 is a wasteful number, since it uses less digits than its factorization.

2121640206410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54307477.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 2121640206410 its reverse (146020461212), we get a palindrome (2267660667622).

The spelling of 2121640206410 in words is "two trillion, one hundred twenty-one billion, six hundred forty million, two hundred six thousand, four hundred ten".