2021111210 has 16 divisors (see below), whose sum is σ = 3763449000. Its totient is φ = 780566976.

The previous prime is 2021111207. The next prime is 2021111243. The reversal of 2021111210 is 121111202.

It can be written as a sum of positive squares in 4 ways, for example, as 1865635249 + 155475961 = 43193^2 + 12469^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021111191 and 2021111200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3484385 + ... + 3484964.

Almost surely, 2^2021111210 is an apocalyptic number.

2021111210 is a deficient number, since it is larger than the sum of its proper divisors (1742337790).

2021111210 is a wasteful number, since it uses less digits than its factorization.

2021111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6969385.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2021111210 is about 44956.7704578521. The cubic root of 2021111210 is about 1264.3386191031.

Adding to 2021111210 its reverse (121111202), we get a palindrome (2142222412).

The spelling of 2021111210 in words is "two billion, twenty-one million, one hundred eleven thousand, two hundred ten".