2001211211222 has 64 divisors (see below), whose sum is σ = 3212935262208. Its totient is φ = 933259968000.

The previous prime is 2001211211171. The next prime is 2001211211239. The reversal of 2001211211222 is 2221121121002.

It is a self number, because there is not a number n which added to its sum of digits gives 2001211211222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69181322 + ... + 69210242.

It is an arithmetic number, because the mean of its divisors is an integer number (50202113472).

Almost surely, 2^{2001211211222} is an apocalyptic number.

2001211211222 is a deficient number, since it is larger than the sum of its proper divisors (1211724050986).

2001211211222 is a wasteful number, since it uses less digits than its factorization.

2001211211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29325.

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

Adding to 2001211211222 its reverse (2221121121002), we get a palindrome (4222332332224).

The spelling of 2001211211222 in words is "two trillion, one billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-two".