2001222211210 has 16 divisors (see below), whose sum is σ = 3607114318056. Its totient is φ = 799396809408.

The previous prime is 2001222211207. The next prime is 2001222211223. The reversal of 2001222211210 is 121122221002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1747982784769 + 253239426441 = 1322113^2 + 503229^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136501689 + ... + 136516348.

Almost surely, 2^{2001222211210} is an apocalyptic number.

2001222211210 is a deficient number, since it is larger than the sum of its proper divisors (1605892106846).

2001222211210 is a wasteful number, since it uses less digits than its factorization.

2001222211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273018777.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2001222211210 its reverse (121122221002), we get a palindrome (2122344432212).

The spelling of 2001222211210 in words is "two trillion, one billion, two hundred twenty-two million, two hundred eleven thousand, two hundred ten".