20201101101 has 12 divisors (see below), whose sum is σ = 29181876828. Its totient is φ = 13466242944.

The previous prime is 20201101091. The next prime is 20201101117. The reversal of 20201101101 is 10110110202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7969847076 + 12231254025 = 89274^2 + 110595^2 .

It is not a de Polignac number, because 20201101101 - 2⁵ = 20201101069 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 (20201101171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21631 + ... + 202163.

It is an arithmetic number, because the mean of its divisors is an integer number (2431823069).

Almost surely, 2^20201101101 is an apocalyptic number.

It is an amenable number.

20201101101 is a deficient number, since it is larger than the sum of its proper divisors (8980775727).

20201101101 is a wasteful number, since it uses less digits than its factorization.

20201101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192972 (or 192969 counting only the distinct ones).

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

Adding to 20201101101 its reverse (10110110202), we get a palindrome (30311211303).

The spelling of 20201101101 in words is "twenty billion, two hundred one million, one hundred one thousand, one hundred one".