2001220110122 has 4 divisors (see below), whose sum is σ = 3001830165186. Its totient is φ = 1000610055060.

The previous prime is 2001220110101. The next prime is 2001220110139. The reversal of 2001220110122 is 2210110221002.

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., 1816028455201 + 185191654921 = 1347601^2 + 430339^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001220110097 and 2001220110106.

It is an unprimeable number.

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, 500305027529 + ... + 500305027532.

Almost surely, 2^{2001220110122} is an apocalyptic number.

2001220110122 is a deficient number, since it is larger than the sum of its proper divisors (1000610055064).

2001220110122 is a wasteful number, since it uses less digits than its factorization.

2001220110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000610055063.

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

Adding to 2001220110122 its reverse (2210110221002), we get a palindrome (4211330331124).

The spelling of 2001220110122 in words is "two trillion, one billion, two hundred twenty million, one hundred ten thousand, one hundred twenty-two".