1001332222221 has 16 divisors (see below), whose sum is σ = 1372186782848. Its totient is φ = 649042372800.

The previous prime is 1001332222217. The next prime is 1001332222229. The reversal of 1001332222221 is 1222222331001.

It is not a de Polignac number, because 1001332222221 - 2² = 1001332222217 is a prime.

It is a super-2 number, since 2×1001332222221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001332222229) 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, 3112825 + ... + 3419406.

It is an arithmetic number, because the mean of its divisors is an integer number (85761673928).

Almost surely, 2^{1001332222221} is an apocalyptic number.

It is an amenable number.

1001332222221 is a deficient number, since it is larger than the sum of its proper divisors (370854560627).

1001332222221 is a wasteful number, since it uses less digits than its factorization.

1001332222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6533652.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1001332222221 its reverse (1222222331001), we get a palindrome (2223554553222).

The spelling of 1001332222221 in words is "one trillion, one billion, three hundred thirty-two million, two hundred twenty-two thousand, two hundred twenty-one".