1001222111213 has 16 divisors (see below), whose sum is σ = 1042619278512. Its totient is φ = 960638400000.

The previous prime is 1001222111173. The next prime is 1001222111221. The reversal of 1001222111213 is 3121112221001.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 52238302249 + 948983808964 = 228557^2 + 974158^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001222111213 - 2³² = 996927143917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001222111191 and 1001222111200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001222411213) 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, 18011963 + ... + 18067463.

It is an arithmetic number, because the mean of its divisors is an integer number (65163704907).

Almost surely, 2^{1001222111213} is an apocalyptic number.

It is an amenable number.

1001222111213 is a deficient number, since it is larger than the sum of its proper divisors (41397167299).

1001222111213 is an equidigital number, since it uses as much as digits as its factorization.

1001222111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62816.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1001222111213 its reverse (3121112221001), we get a palindrome (4122334332214).

The spelling of 1001222111213 in words is "one trillion, one billion, two hundred twenty-two million, one hundred eleven thousand, two hundred thirteen".