20021100110 has 32 divisors (see below), whose sum is σ = 39517902432. Its totient is φ = 7242670080.

The previous prime is 20021100083. The next prime is 20021100119. The reversal of 20021100110 is 1100112002.

It is a super-2 number, since 2×20021100110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021100119) 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 15 ways as a sum of consecutive naturals, for example, 450299 + ... + 492758.

It is an arithmetic number, because the mean of its divisors is an integer number (1234934451).

Almost surely, 2^20021100110 is an apocalyptic number.

20021100110 is a deficient number, since it is larger than the sum of its proper divisors (19496802322).

20021100110 is a wasteful number, since it uses less digits than its factorization.

20021100110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943268.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20021100110 its reverse (1100112002), we get a palindrome (21121212112).

The spelling of 20021100110 in words is "twenty billion, twenty-one million, one hundred thousand, one hundred ten".