2001122212012 has 48 divisors (see below), whose sum is σ = 4404722821632. Its totient is φ = 772758362880.

The previous prime is 2001122211941. The next prime is 2001122212013. The reversal of 2001122212012 is 2102122211002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2001122212013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28713648 + ... + 28783255.

It is an arithmetic number, because the mean of its divisors is an integer number (91765058784).

Almost surely, 2^{2001122212012} is an apocalyptic number.

2001122212012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2001122212012 is an abundant number, since it is smaller than the sum of its proper divisors (2403600609620).

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

2001122212012 is a wasteful number, since it uses less digits than its factorization.

2001122212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57497038 (or 57497036 counting only the distinct ones).

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

Adding to 2001122212012 its reverse (2102122211002), we get a palindrome (4103244423014).

The spelling of 2001122212012 in words is "two trillion, one billion, one hundred twenty-two million, two hundred twelve thousand, twelve".