20011220103 has 24 divisors (see below), whose sum is σ = 31088583408.
Its totient is φ = 11416277376.
The previous prime is 20011220093. The next prime is 20011220113. The reversal of 20011220103 is 30102211002.
It is an interprime number because it is at equal distance from previous prime (20011220093) and next prime (20011220113).
It is not a de Polignac number, because 20011220103 - 28 = 20011219847 is a prime.
It is a super-2 number, since 2×200112201032 (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 (20011220113) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20926 + ... + 201147.
It is an arithmetic number, because the mean of its divisors is an integer number (1295357642).
Almost surely, 220011220103 is an apocalyptic number.
20011220103 is a deficient number, since it is larger than the sum of its proper divisors (11077363305).
20011220103 is a wasteful number, since it uses less digits than its factorization.
20011220103 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 222703 (or 222696 counting only the distinct ones).
The product of its (nonzero) digits is 24, while the sum is 12.
Adding to 20011220103 its reverse (30102211002), we get a palindrome (50113431105).
The spelling of 20011220103 in words is "twenty billion, eleven million, two hundred twenty thousand, one hundred three".