1001112111221 has 8 divisors (see below), whose sum is σ = 1002244104960. Its totient is φ = 999980396352.

The previous prime is 1001112111211. The next prime is 1001112111269. The reversal of 1001112111221 is 1221112111001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001112111221 is a prime.

It is a super-2 number, since 2×1001112111221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001112111196 and 1001112111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001112111211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7585826 + ... + 7716668.

It is an arithmetic number, because the mean of its divisors is an integer number (125280513120).

Almost surely, 2^{1001112111221} is an apocalyptic number.

It is an amenable number.

1001112111221 is a deficient number, since it is larger than the sum of its proper divisors (1131993739).

1001112111221 is a wasteful number, since it uses less digits than its factorization.

1001112111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139435.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1001112111221 its reverse (1221112111001), we get a palindrome (2222224222222).

The spelling of 1001112111221 in words is "one trillion, one billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty-one".