20111020211112 has 128 divisors (see below), whose sum is σ = 50988745416960. Its totient is φ = 6609692620800.

The previous prime is 20111020211071. The next prime is 20111020211171. The reversal of 20111020211112 is 21111202011102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20111020211091 and 20111020211100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267634698 + ... + 267709830.

It is an arithmetic number, because the mean of its divisors is an integer number (398349573570).

Almost surely, 2^{20111020211112} is an apocalyptic number.

It is an amenable number.

20111020211112 is an abundant number, since it is smaller than the sum of its proper divisors (30877725205848).

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

20111020211112 is a wasteful number, since it uses less digits than its factorization.

20111020211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75843 (or 75839 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20111020211112 its reverse (21111202011102), we get a palindrome (41222222222214).

The spelling of 20111020211112 in words is "twenty trillion, one hundred eleven billion, twenty million, two hundred eleven thousand, one hundred twelve".