2021100220210 has 16 divisors (see below), whose sum is σ = 3650396717016. Its totient is φ = 805680905728.

The previous prime is 2021100220163. The next prime is 2021100220213. The reversal of 2021100220210 is 120220011202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1753979735641 + 267120484569 = 1324379^2 + 516837^2 .

It is a super-2 number, since 2×2021100220210² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021100220213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344894719 + ... + 344900578.

Almost surely, 2^{2021100220210} is an apocalyptic number.

2021100220210 is a deficient number, since it is larger than the sum of its proper divisors (1629296496806).

2021100220210 is a wasteful number, since it uses less digits than its factorization.

2021100220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689795597.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2021100220210 its reverse (120220011202), we get a palindrome (2141320231412).

The spelling of 2021100220210 in words is "two trillion, twenty-one billion, one hundred million, two hundred twenty thousand, two hundred ten".