20210111101 has 16 divisors (see below), whose sum is σ = 20713537728. Its totient is φ = 19713456000.

The previous prime is 20210111093. The next prime is 20210111111. The reversal of 20210111101 is 10111101202.

It is a cyclic number.

It is not a de Polignac number, because 20210111101 - 2³ = 20210111093 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 (20210111111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5473666 + ... + 5477356.

It is an arithmetic number, because the mean of its divisors is an integer number (1294596108).

Almost surely, 2^20210111101 is an apocalyptic number.

It is an amenable number.

20210111101 is a deficient number, since it is larger than the sum of its proper divisors (503426627).

20210111101 is a wasteful number, since it uses less digits than its factorization.

20210111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4572.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20210111101 its reverse (10111101202), we get a palindrome (30321212303).

It can be divided in two parts, 202 and 10111101, that multiplied together give a palindrome (2042442402).

The spelling of 20210111101 in words is "twenty billion, two hundred ten million, one hundred eleven thousand, one hundred one".