2001220112122 has 24 divisors (see below), whose sum is σ = 3809372608800. Its totient is φ = 779696147160.

The previous prime is 2001220112113. The next prime is 2001220112123. The reversal of 2001220112122 is 2212110221002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2001220112096 and 2001220112105.

It is not an unprimeable number, because it can be changed into a prime (2001220112123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 928208622 + ... + 928210777.

It is an arithmetic number, because the mean of its divisors is an integer number (158723858700).

Almost surely, 2^{2001220112122} is an apocalyptic number.

2001220112122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2001220112122 is a deficient number, since it is larger than the sum of its proper divisors (1808152496678).

2001220112122 is a wasteful number, since it uses less digits than its factorization.

2001220112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856419426 (or 1856419419 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2001220112122 its reverse (2212110221002), we get a palindrome (4213330333124).

The spelling of 2001220112122 in words is "two trillion, one billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty-two".