20111112102 has 16 divisors (see below), whose sum is σ = 40233927600. Its totient is φ = 6701753472.

The previous prime is 20111112097. The next prime is 20111112121. The reversal of 20111112102 is 20121111102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465223 + ... + 506610.

It is an arithmetic number, because the mean of its divisors is an integer number (2514620475).

Almost surely, 2^20111112102 is an apocalyptic number.

20111112102 is an abundant number, since it is smaller than the sum of its proper divisors (20122815498).

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

20111112102 is a wasteful number, since it uses less digits than its factorization.

20111112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975287.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111112102 its reverse (20121111102), we get a palindrome (40232223204).

The spelling of 20111112102 in words is "twenty billion, one hundred eleven million, one hundred twelve thousand, one hundred two".