20020100111 has 32 divisors (see below), whose sum is σ = 22937665536. Its totient is φ = 17307612000.

The previous prime is 20020100081. The next prime is 20020100141. The reversal of 20020100111 is 11100102002.

It is an interprime number because it is at equal distance from previous prime (20020100081) and next prime (20020100141).

It is a cyclic number.

It is not a de Polignac number, because 20020100111 - 2⁶ = 20020100047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020100141) 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 31 ways as a sum of consecutive naturals, for example, 8400026 + ... + 8402408.

It is an arithmetic number, because the mean of its divisors is an integer number (716802048).

Almost surely, 2^20020100111 is an apocalyptic number.

20020100111 is a deficient number, since it is larger than the sum of its proper divisors (2917565425).

20020100111 is a wasteful number, since it uses less digits than its factorization.

20020100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20020100111 its reverse (11100102002), we get a palindrome (31120202113).

The spelling of 20020100111 in words is "twenty billion, twenty million, one hundred thousand, one hundred eleven".