20201220110 has 16 divisors (see below), whose sum is σ = 36396422496. Its totient is φ = 8072882208.

The previous prime is 20201220107. The next prime is 20201220119. The reversal of 20201220110 is 1102210202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20201220091 and 20201220100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201220119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939569 + ... + 960828.

It is an arithmetic number, because the mean of its divisors is an integer number (2274776406).

Almost surely, 2^20201220110 is an apocalyptic number.

20201220110 is a deficient number, since it is larger than the sum of its proper divisors (16195202386).

20201220110 is a wasteful number, since it uses less digits than its factorization.

20201220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901467.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20201220110 its reverse (1102210202), we get a palindrome (21303430312).

The spelling of 20201220110 in words is "twenty billion, two hundred one million, two hundred twenty thousand, one hundred ten".