20111210112 has 256 divisors, whose sum is σ = 62484710400. Its totient is φ = 5612544000.

The previous prime is 20111210107. The next prime is 20111210129. The reversal of 20111210112 is 21101211102.

It is a super-2 number, since 2×20111210112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33462612 + ... + 33463212.

It is an arithmetic number, because the mean of its divisors is an integer number (244080900).

Almost surely, 2^20111210112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31242355200).

20111210112 is an abundant number, since it is smaller than the sum of its proper divisors (42373500288).

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

20111210112 is a wasteful number, since it uses less digits than its factorization.

20111210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895 (or 883 counting only the distinct ones).

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

Adding to 20111210112 its reverse (21101211102), we get a palindrome (41212421214).

The spelling of 20111210112 in words is "twenty billion, one hundred eleven million, two hundred ten thousand, one hundred twelve".