20111111122112 has 56 divisors (see below), whose sum is σ = 42072426737376. Its totient is φ = 9519199100928.

The previous prime is 20111111122061. The next prime is 20111111122163. The reversal of 20111111122112 is 21122111111102.

It is an interprime number because it is at equal distance from previous prime (20111111122061) and next prime (20111111122163).

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, 70282163 + ... + 70567730.

It is an arithmetic number, because the mean of its divisors is an integer number (751293334596).

Almost surely, 2^{20111111122112} is an apocalyptic number.

It is an amenable number.

20111111122112 is an abundant number, since it is smaller than the sum of its proper divisors (21961315615264).

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

20111111122112 is a wasteful number, since it uses less digits than its factorization.

20111111122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140850025 (or 140850015 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 20111111122112 its reverse (21122111111102), we get a palindrome (41233222233214).

The spelling of 20111111122112 in words is "twenty trillion, one hundred eleven billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twelve".