21202020011110 has 16 divisors (see below), whose sum is σ = 38520305517456. Its totient is φ = 8401548116128.

The previous prime is 21202020011099. The next prime is 21202020011119. The reversal of 21202020011110 is 1111002020212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202020011119) 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, 9907484917 + ... + 9907487056.

It is an arithmetic number, because the mean of its divisors is an integer number (2407519094841).

Almost surely, 2^{21202020011110} is an apocalyptic number.

21202020011110 is a deficient number, since it is larger than the sum of its proper divisors (17318285506346).

21202020011110 is a wasteful number, since it uses less digits than its factorization.

21202020011110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19814972087.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21202020011110 its reverse (1111002020212), we get a palindrome (22313022031322).

The spelling of 21202020011110 in words is "twenty-one trillion, two hundred two billion, twenty million, eleven thousand, one hundred ten".