2021220110 has 64 divisors (see below), whose sum is σ = 4569264000. Its totient is φ = 639668736.

The previous prime is 2021220109. The next prime is 2021220139. The reversal of 2021220110 is 110221202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2021220091 and 2021220100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21926 + ... + 67254.

It is an arithmetic number, because the mean of its divisors is an integer number (71394750).

Almost surely, 2^2021220110 is an apocalyptic number.

2021220110 is an abundant number, since it is smaller than the sum of its proper divisors (2548043890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021220110 is a wasteful number, since it uses less digits than its factorization.

2021220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45370 (or 45356 counting only the distinct ones).

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

The square root of 2021220110 is about 44957.9816050498. The cubic root of 2021220110 is about 1264.3613267440.

Adding to 2021220110 its reverse (110221202), we get a palindrome (2131441312).

The spelling of 2021220110 in words is "two billion, twenty-one million, two hundred twenty thousand, one hundred ten".