2001122112 has 56 divisors (see below), whose sum is σ = 5775972192. Its totient is φ = 606400000.

The previous prime is 2001122099. The next prime is 2001122117. The reversal of 2001122112 is 2112211002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001122117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471639 + ... + 475862.

Almost surely, 2^2001122112 is an apocalyptic number.

2001122112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2001122112 is an abundant number, since it is smaller than the sum of its proper divisors (3774850080).

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

2001122112 is a wasteful number, since it uses less digits than its factorization.

2001122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947527 (or 947517 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2001122112 is about 44733.9033843460. The cubic root of 2001122112 is about 1260.1566345965.

Adding to 2001122112 its reverse (2112211002), we get a palindrome (4113333114).

The spelling of 2001122112 in words is "two billion, one million, one hundred twenty-two thousand, one hundred twelve".