2001222212210 has 64 divisors (see below), whose sum is σ = 4025967079680. Its totient is φ = 711138650880.

The previous prime is 2001222212191. The next prime is 2001222212233. The reversal of 2001222212210 is 122122221002.

It is a happy 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, 319049 + ... + 2025891.

It is an arithmetic number, because the mean of its divisors is an integer number (62905735620).

Almost surely, 2^{2001222212210} is an apocalyptic number.

2001222212210 is an abundant number, since it is smaller than the sum of its proper divisors (2024744867470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001222212210 is a wasteful number, since it uses less digits than its factorization.

2001222212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707203.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2001222212210 its reverse (122122221002), we get a palindrome (2123344433212).

The spelling of 2001222212210 in words is "two trillion, one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred ten".