2001121122194 has 32 divisors (see below), whose sum is σ = 3163138992000. Its totient is φ = 946857873024.

The previous prime is 2001121122157. The next prime is 2001121122197. The reversal of 2001121122194 is 4912211211002.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001121122197) 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, 155977772 + ... + 155990600.

It is an arithmetic number, because the mean of its divisors is an integer number (98848093500).

Almost surely, 2^{2001121122194} is an apocalyptic number.

2001121122194 is a deficient number, since it is larger than the sum of its proper divisors (1162017869806).

2001121122194 is a wasteful number, since it uses less digits than its factorization.

2001121122194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17042.

The product of its (nonzero) digits is 576, while the sum is 26.

Adding to 2001121122194 its reverse (4912211211002), we get a palindrome (6913332333196).

The spelling of 2001121122194 in words is "two trillion, one billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred ninety-four".