1111002201221 has 4 divisors (see below), whose sum is σ = 1212002401344. Its totient is φ = 1010002001100.

The previous prime is 1111002201191. The next prime is 1111002201247. The reversal of 1111002201221 is 1221022001111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1111002201221 - 2¹⁸ = 1111001939077 is a prime.

It is a super-2 number, since 2×1111002201221² (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 = 1111002201196 and 1111002201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111002201251) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 50500100045 + ... + 50500100066.

It is an arithmetic number, because the mean of its divisors is an integer number (303000600336).

Almost surely, 2^{1111002201221} is an apocalyptic number.

1111002201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111002201221 is a deficient number, since it is larger than the sum of its proper divisors (101000200123).

1111002201221 is a wasteful number, since it uses less digits than its factorization.

1111002201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101000200122.

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

Adding to 1111002201221 its reverse (1221022001111), we get a palindrome (2332024202332).

The spelling of 1111002201221 in words is "one trillion, one hundred eleven billion, two million, two hundred one thousand, two hundred twenty-one".