20020111101 has 12 divisors (see below), whose sum is σ = 28919636928. Its totient is φ = 13345956744.

The previous prime is 20020111091. The next prime is 20020111231. The reversal of 20020111101 is 10111102002.

It is a happy number.

It is not a de Polignac number, because 20020111101 - 2⁷ = 20020110973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020111301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125836 + ... + 236378.

It is an arithmetic number, because the mean of its divisors is an integer number (2409969744).

Almost surely, 2^20020111101 is an apocalyptic number.

It is an amenable number.

20020111101 is a deficient number, since it is larger than the sum of its proper divisors (8899525827).

20020111101 is a wasteful number, since it uses less digits than its factorization.

20020111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130672 (or 130669 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20020111101 its reverse (10111102002), we get a palindrome (30131213103).

Subtracting from 20020111101 its reverse (10111102002), we obtain a palindrome (9909009099).

The spelling of 20020111101 in words is "twenty billion, twenty million, one hundred eleven thousand, one hundred one".