2001123310212 has 240 divisors, whose sum is σ = 5674980769920. Its totient is φ = 611232417792.

The previous prime is 2001123310211. The next prime is 2001123310237. The reversal of 2001123310212 is 2120133211002.

2001123310212 is a `hidden beast` number, since 20 + 0 + 1 + 123 + 310 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2001123310211) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1059354964 + ... + 1059356852.

It is an arithmetic number, because the mean of its divisors is an integer number (23645753208).

Almost surely, 2^{2001123310212} 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 2001123310212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2837490384960).

2001123310212 is an abundant number, since it is smaller than the sum of its proper divisors (3673857459708).

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

2001123310212 is a wasteful number, since it uses less digits than its factorization.

2001123310212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3624 (or 3613 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2001123310212 its reverse (2120133211002), we get a palindrome (4121256521214).

The spelling of 2001123310212 in words is "two trillion, one billion, one hundred twenty-three million, three hundred ten thousand, two hundred twelve".