20110201101 has 32 divisors (see below), whose sum is σ = 30123325440. Its totient is φ = 13258929600.

The previous prime is 20110201079. The next prime is 20110201127. The reversal of 20110201101 is 10110201102.

It is a happy number.

It is not a de Polignac number, because 20110201101 - 2⁷ = 20110200973 is a prime.

It is a super-2 number, since 2×20110201101² (a number of 21 digits) contains 22 as substring.

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 (20110201201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 880891 + ... + 903431.

It is an arithmetic number, because the mean of its divisors is an integer number (941353920).

Almost surely, 2^20110201101 is an apocalyptic number.

It is an amenable number.

20110201101 is a deficient number, since it is larger than the sum of its proper divisors (10013124339).

20110201101 is a wasteful number, since it uses less digits than its factorization.

20110201101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22914 (or 22908 counting only the distinct ones).

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

Adding to 20110201101 its reverse (10110201102), we get a palindrome (30220402203).

Subtracting from 20110201101 its reverse (10110201102), we obtain a palindrome (9999999999).

The spelling of 20110201101 in words is "twenty billion, one hundred ten million, two hundred one thousand, one hundred one".