20102221111 has 8 divisors (see below), whose sum is σ = 23033954304. Its totient is φ = 17185484760.

The previous prime is 20102221001. The next prime is 20102221159. The reversal of 20102221111 is 11112220102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20102221111 - 2¹⁵ = 20102188343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102221091 and 20102221100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102221171) 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, 3746335 + ... + 3751696.

It is an arithmetic number, because the mean of its divisors is an integer number (2879244288).

Almost surely, 2^20102221111 is an apocalyptic number.

20102221111 is a deficient number, since it is larger than the sum of its proper divisors (2931733193).

20102221111 is an equidigital number, since it uses as much as digits as its factorization.

20102221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7498421.

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

Adding to 20102221111 its reverse (11112220102), we get a palindrome (31214441213).

The spelling of 20102221111 in words is "twenty billion, one hundred two million, two hundred twenty-one thousand, one hundred eleven".