21211120202110 has 16 divisors (see below), whose sum is σ = 38558036329632. Its totient is φ = 8400443644000.

The previous prime is 21211120201993. The next prime is 21211120202117. The reversal of 21211120202110 is 1120202111212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211120202117) by changing a digit.

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, 10500553546 + ... + 10500555565.

It is an arithmetic number, because the mean of its divisors is an integer number (2409877270602).

Almost surely, 2^{21211120202110} is an apocalyptic number.

21211120202110 is a deficient number, since it is larger than the sum of its proper divisors (17346916127522).

21211120202110 is a wasteful number, since it uses less digits than its factorization.

21211120202110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21001109219.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211120202110 its reverse (1120202111212), we get a palindrome (22331322313322).

The spelling of 21211120202110 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty million, two hundred two thousand, one hundred ten".