2021111020210 has 16 divisors (see below), whose sum is σ = 3638108943000. Its totient is φ = 808420162176.

The previous prime is 2021111020207. The next prime is 2021111020211. The reversal of 2021111020210 is 120201111202.

It can be written as a sum of positive squares in 4 ways, for example, as 1890660750169 + 130450270041 = 1375013^2 + 361179^2 .

It is not an unprimeable number, because it can be changed into a prime (2021111020211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2678685 + ... + 3349264.

Almost surely, 2^{2021111020210} is an apocalyptic number.

2021111020210 is a deficient number, since it is larger than the sum of its proper divisors (1616997922790).

2021111020210 is a wasteful number, since it uses less digits than its factorization.

2021111020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061485.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021111020210 its reverse (120201111202), we get a palindrome (2141312131412).

The spelling of 2021111020210 in words is "two trillion, twenty-one billion, one hundred eleven million, twenty thousand, two hundred ten".