2001122122222 has 8 divisors (see below), whose sum is σ = 3058318715256. Its totient is φ = 981682550472.

The previous prime is 2001122122193. The next prime is 2001122122231. The reversal of 2001122122222 is 2222212211002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2001122122222² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2001122122222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9439255188 + ... + 9439255399.

It is an arithmetic number, because the mean of its divisors is an integer number (382289839407).

Almost surely, 2^{2001122122222} is an apocalyptic number.

2001122122222 is a deficient number, since it is larger than the sum of its proper divisors (1057196593034).

2001122122222 is a wasteful number, since it uses less digits than its factorization.

2001122122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18878510642.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2001122122222 its reverse (2222212211002), we get a palindrome (4223334333224).

The spelling of 2001122122222 in words is "two trillion, one billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-two".