10021111211 has 16 divisors (see below), whose sum is σ = 10518076800. Its totient is φ = 9534715008.

The previous prime is 10021111187. The next prime is 10021111249. The reversal of 10021111211 is 11211112001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10021111211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021111192 and 10021111201.

It is not an unprimeable number, because it can be changed into a prime (10021111291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272161 + ... + 1280013.

It is an arithmetic number, because the mean of its divisors is an integer number (657379800).

Almost surely, 2^10021111211 is an apocalyptic number.

10021111211 is a deficient number, since it is larger than the sum of its proper divisors (496965589).

10021111211 is an equidigital number, since it uses as much as digits as its factorization.

10021111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8518.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 10021111211 its reverse (11211112001), we get a palindrome (21232223212).

The spelling of 10021111211 in words is "ten billion, twenty-one million, one hundred eleven thousand, two hundred eleven".