2121203323210 has 64 divisors (see below), whose sum is σ = 3895577610912. Its totient is φ = 831447023616.

The previous prime is 2121203323193. The next prime is 2121203323219. The reversal of 2121203323210 is 123233021212.

It can be written as a sum of positive squares in 16 ways, for example, as 215072410081 + 1906130913129 = 463759^2 + 1380627^2 .

It is not an unprimeable number, because it can be changed into a prime (2121203323219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71365272 + ... + 71394988.

Almost surely, 2^{2121203323210} is an apocalyptic number.

2121203323210 is a deficient number, since it is larger than the sum of its proper divisors (1774374287702).

2121203323210 is a wasteful number, since it uses less digits than its factorization.

2121203323210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30427.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 2121203323210 its reverse (123233021212), we get a palindrome (2244436344422).

The spelling of 2121203323210 in words is "two trillion, one hundred twenty-one billion, two hundred three million, three hundred twenty-three thousand, two hundred ten".