2001201210122 has 4 divisors (see below), whose sum is σ = 3001801815186. Its totient is φ = 1000600605060.

The previous prime is 2001201210121. The next prime is 2001201210163. The reversal of 2001201210122 is 2210121021002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1579443184081 + 421758026041 = 1256759^2 + 649429^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001201210097 and 2001201210106.

It is not an unprimeable number, because it can be changed into a prime (2001201210121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500300302529 + ... + 500300302532.

Almost surely, 2^{2001201210122} is an apocalyptic number.

2001201210122 is a deficient number, since it is larger than the sum of its proper divisors (1000600605064).

2001201210122 is a wasteful number, since it uses less digits than its factorization.

2001201210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000600605063.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2001201210122 its reverse (2210121021002), we get a palindrome (4211322231124).

The spelling of 2001201210122 in words is "two trillion, one billion, two hundred one million, two hundred ten thousand, one hundred twenty-two".