2021161110 has 64 divisors (see below), whose sum is σ = 5359468032. Its totient is φ = 485213696.

The previous prime is 2021161067. The next prime is 2021161111. The reversal of 2021161110 is 111611202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2021161110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021161111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74424 + ... + 97883.

It is an arithmetic number, because the mean of its divisors is an integer number (83741688).

Almost surely, 2^2021161110 is an apocalyptic number.

2021161110 is an abundant number, since it is smaller than the sum of its proper divisors (3338306922).

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

2021161110 is a wasteful number, since it uses less digits than its factorization.

2021161110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172357.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 2021161110 is about 44957.3254320139. The cubic root of 2021161110 is about 1264.3490242666.

Adding to 2021161110 its reverse (111611202), we get a palindrome (2132772312).

The spelling of 2021161110 in words is "two billion, twenty-one million, one hundred sixty-one thousand, one hundred ten".