2001221211122 has 32 divisors (see below), whose sum is σ = 3525426253440. Its totient is φ = 834107886720.

The previous prime is 2001221211113. The next prime is 2001221211131. The reversal of 2001221211122 is 2211121221002.

It is an interprime number because it is at equal distance from previous prime (2001221211113) and next prime (2001221211131).

It is a self number, because there is not a number n which added to its sum of digits gives 2001221211122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5317172 + ... + 5681087.

It is an arithmetic number, because the mean of its divisors is an integer number (110169570420).

Almost surely, 2^{2001221211122} is an apocalyptic number.

2001221211122 is a deficient number, since it is larger than the sum of its proper divisors (1524205042318).

2001221211122 is a wasteful number, since it uses less digits than its factorization.

2001221211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10998626.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2001221211122 its reverse (2211121221002), we get a palindrome (4212342432124).

The spelling of 2001221211122 in words is "two trillion, one billion, two hundred twenty-one million, two hundred eleven thousand, one hundred twenty-two".