2001211100122 has 32 divisors (see below), whose sum is σ = 3241716266880. Its totient is φ = 921070718400.

The previous prime is 2001211100117. The next prime is 2001211100123. The reversal of 2001211100122 is 2210011121002.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (2001211100123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13468029 + ... + 13615807.

It is an arithmetic number, because the mean of its divisors is an integer number (101303633340).

Almost surely, 2^{2001211100122} is an apocalyptic number.

2001211100122 is a deficient number, since it is larger than the sum of its proper divisors (1240505166758).

2001211100122 is a wasteful number, since it uses less digits than its factorization.

2001211100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149238.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001211100122 its reverse (2210011121002), we get a palindrome (4211222221124).

The spelling of 2001211100122 in words is "two trillion, one billion, two hundred eleven million, one hundred thousand, one hundred twenty-two".