20200101111 has 8 divisors (see below), whose sum is σ = 29926075760. Its totient is φ = 13466734056.

The previous prime is 20200101071. The next prime is 20200101143. The reversal of 20200101111 is 11110100202.

It is a happy number.

It is not a de Polignac number, because 20200101111 - 2¹⁴ = 20200084727 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20200101093 and 20200101102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200101151) 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, 374075920 + ... + 374075973.

It is an arithmetic number, because the mean of its divisors is an integer number (3740759470).

Almost surely, 2^20200101111 is an apocalyptic number.

20200101111 is a deficient number, since it is larger than the sum of its proper divisors (9725974649).

20200101111 is an equidigital number, since it uses as much as digits as its factorization.

20200101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748151902 (or 748151896 counting only the distinct ones).

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

Adding to 20200101111 its reverse (11110100202), we get a palindrome (31310201313).

Subtracting from 20200101111 its reverse (11110100202), we obtain a palindrome (9090000909).

The spelling of 20200101111 in words is "twenty billion, two hundred million, one hundred one thousand, one hundred eleven".