20110111201 has 4 divisors (see below), whose sum is σ = 20254788400. Its totient is φ = 19965434004.

The previous prime is 20110111193. The next prime is 20110111211. The reversal of 20110111201 is 10211101102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20110111201 - 2³ = 20110111193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110111211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72338391 + ... + 72338668.

It is an arithmetic number, because the mean of its divisors is an integer number (5063697100).

Almost surely, 2^20110111201 is an apocalyptic number.

It is an amenable number.

20110111201 is a deficient number, since it is larger than the sum of its proper divisors (144677199).

20110111201 is a wasteful number, since it uses less digits than its factorization.

20110111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144677198.

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

Adding to 20110111201 its reverse (10211101102), we get a palindrome (30321212303).

The spelling of 20110111201 in words is "twenty billion, one hundred ten million, one hundred eleven thousand, two hundred one".