20111100201 has 16 divisors (see below), whose sum is σ = 29796597120. Its totient is φ = 13406331600.

The previous prime is 20111100193. The next prime is 20111100209. The reversal of 20111100201 is 10200111102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20111100193) and next prime (20111100209).

It is not a de Polignac number, because 20111100201 - 2³ = 20111100193 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (20111100209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465676 + ... + 507026.

It is an arithmetic number, because the mean of its divisors is an integer number (1862287320).

Almost surely, 2^20111100201 is an apocalyptic number.

It is an amenable number.

20111100201 is a deficient number, since it is larger than the sum of its proper divisors (9685496919).

20111100201 is a wasteful number, since it uses less digits than its factorization.

20111100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59373 (or 59367 counting only the distinct ones).

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

Adding to 20111100201 its reverse (10200111102), we get a palindrome (30311211303).

The spelling of 20111100201 in words is "twenty billion, one hundred eleven million, one hundred thousand, two hundred one".