1000002222221 has 16 divisors (see below), whose sum is σ = 1054277078400. Its totient is φ = 947056289088.

The previous prime is 1000002222203. The next prime is 1000002222229. The reversal of 1000002222221 is 1222222000001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000002222221 is a prime.

It is a super-5 number, since 5×1000002222221⁵ (a number of 61 digits) contains 55555 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000002222196 and 1000002222205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000002222229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5984120 + ... + 6148958.

It is an arithmetic number, because the mean of its divisors is an integer number (65892317400).

Almost surely, 2^{1000002222221} is an apocalyptic number.

It is an amenable number.

1000002222221 is a deficient number, since it is larger than the sum of its proper divisors (54274856179).

1000002222221 is a wasteful number, since it uses less digits than its factorization.

1000002222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168868.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1000002222221 its reverse (1222222000001), we get a palindrome (2222224222222).

The spelling of 1000002222221 in words is "one trillion, two million, two hundred twenty-two thousand, two hundred twenty-one".