1111001022221 has 8 divisors (see below), whose sum is σ = 1122052349664. Its totient is φ = 1099950701200.

The previous prime is 1111001022193. The next prime is 1111001022239. The reversal of 1111001022221 is 1222201001111.

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

It is a cyclic number.

It is not a de Polignac number, because 1111001022221 - 2²⁶ = 1110933913357 is a prime.

It is a super-2 number, since 2×1111001022221² (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 = 1111001022196 and 1111001022205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111006022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2073506 + ... + 2553708.

It is an arithmetic number, because the mean of its divisors is an integer number (140256543708).

Almost surely, 2^{1111001022221} is an apocalyptic number.

It is an amenable number.

1111001022221 is a deficient number, since it is larger than the sum of its proper divisors (11051327443).

1111001022221 is a wasteful number, since it uses less digits than its factorization.

1111001022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503211.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1111001022221 its reverse (1222201001111), we get a palindrome (2333202023332).

The spelling of 1111001022221 in words is "one trillion, one hundred eleven billion, one million, twenty-two thousand, two hundred twenty-one".