2001121222112 has 48 divisors (see below), whose sum is σ = 3951710945280. Its totient is φ = 997516560768.

The previous prime is 2001121222021. The next prime is 2001121222127. The reversal of 2001121222112 is 2112221211002.

It is a super-2 number, since 2×2001121222112² (a number of 25 digits) contains 22 as substring.

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, 14406689 + ... + 14544927.

It is an arithmetic number, because the mean of its divisors is an integer number (82327311360).

Almost surely, 2^{2001121222112} is an apocalyptic number.

It is an amenable number.

2001121222112 is a deficient number, since it is larger than the sum of its proper divisors (1950589723168).

2001121222112 is a wasteful number, since it uses less digits than its factorization.

2001121222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139623 (or 139615 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2001121222112 its reverse (2112221211002), we get a palindrome (4113342433114).

The spelling of 2001121222112 in words is "two trillion, one billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twelve".