20101111206 has 24 divisors (see below), whose sum is σ = 44189221272. Its totient is φ = 6091245600.

The previous prime is 20101111183. The next prime is 20101111213. The reversal of 20101111206 is 60211110102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13843015 + ... + 13844466.

It is an arithmetic number, because the mean of its divisors is an integer number (1841217553).

Almost surely, 2^20101111206 is an apocalyptic number.

20101111206 is an abundant number, since it is smaller than the sum of its proper divisors (24088110066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101111206 is a wasteful number, since it uses less digits than its factorization.

20101111206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27687508 (or 27687497 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 20101111206 its reverse (60211110102), we get a palindrome (80312221308).

The spelling of 20101111206 in words is "twenty billion, one hundred one million, one hundred eleven thousand, two hundred six".