1001220231222 has 64 divisors (see below), whose sum is σ = 2232057484800. Its totient is φ = 332672948640.

The previous prime is 1001220231173. The next prime is 1001220231233. The reversal of 1001220231222 is 2221320221001.

It is a super-2 number, since 2×1001220231222² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1001220231195 and 1001220231204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26460697 + ... + 26498507.

It is an arithmetic number, because the mean of its divisors is an integer number (34875898200).

Almost surely, 2^{1001220231222} is an apocalyptic number.

1001220231222 is an abundant number, since it is smaller than the sum of its proper divisors (1230837253578).

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

1001220231222 is a wasteful number, since it uses less digits than its factorization.

1001220231222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39378 (or 39372 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1001220231222 its reverse (2221320221001), we get a palindrome (3222540452223).

The spelling of 1001220231222 in words is "one trillion, one billion, two hundred twenty million, two hundred thirty-one thousand, two hundred twenty-two".