2001122122194 has 48 divisors (see below), whose sum is σ = 4677916088664. Its totient is φ = 614591712000.

The previous prime is 2001122122193. The next prime is 2001122122231. The reversal of 2001122122194 is 4912212211002.

2001122122194 is a `hidden beast` number, since 200 + 11 + 221 + 221 + 9 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1375781205969 + 625340916225 = 1172937^2 + 790785^2 .

It is not an unprimeable number, because it can be changed into a prime (2001122122193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7777107 + ... + 8030294.

Almost surely, 2^{2001122122194} is an apocalyptic number.

2001122122194 is an abundant number, since it is smaller than the sum of its proper divisors (2676793966470).

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

2001122122194 is a wasteful number, since it uses less digits than its factorization.

2001122122194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15807963 (or 15807960 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

Adding to 2001122122194 its reverse (4912212211002), we get a palindrome (6913334333196).

The spelling of 2001122122194 in words is "two trillion, one billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred ninety-four".