10020221111 has 4 divisors (see below), whose sum is σ = 10020541824. Its totient is φ = 10019900400.

The previous prime is 10020221077. The next prime is 10020221177. The reversal of 10020221111 is 11112202001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10020221111 is a prime.

It is a super-4 number, since 4×10020221111⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10020221092 and 10020221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020221191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107735 + ... + 177896.

It is an arithmetic number, because the mean of its divisors is an integer number (2505135456).

Almost surely, 2^10020221111 is an apocalyptic number.

10020221111 is a deficient number, since it is larger than the sum of its proper divisors (320713).

10020221111 is an equidigital number, since it uses as much as digits as its factorization.

10020221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320712.

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

Adding to 10020221111 its reverse (11112202001), we get a palindrome (21132423112).

The spelling of 10020221111 in words is "ten billion, twenty million, two hundred twenty-one thousand, one hundred eleven".