20003220111 has 32 divisors (see below), whose sum is σ = 31272261120. Its totient is φ = 11137158144.

The previous prime is 20003220109. The next prime is 20003220131. The reversal of 20003220111 is 11102230002.

It is not a de Polignac number, because 20003220111 - 2¹ = 20003220109 is a prime.

It is a super-2 number, since 2×20003220111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003220131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68571 + ... + 211443.

It is an arithmetic number, because the mean of its divisors is an integer number (977258160).

Almost surely, 2^20003220111 is an apocalyptic number.

20003220111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20003220111 is a deficient number, since it is larger than the sum of its proper divisors (11269041009).

20003220111 is a wasteful number, since it uses less digits than its factorization.

20003220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143055.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20003220111 its reverse (11102230002), we get a palindrome (31105450113).

The spelling of 20003220111 in words is "twenty billion, three million, two hundred twenty thousand, one hundred eleven".