1111012202221 has 4 divisors (see below), whose sum is σ = 1111019196672. Its totient is φ = 1111005207772.

The previous prime is 1111012202191. The next prime is 1111012202239. The reversal of 1111012202221 is 1222022101111.

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 1111012202221 - 2²⁵ = 1110978647789 is a prime.

It is a super-2 number, since 2×1111012202221² (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 = 1111012202195 and 1111012202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111012232221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3253291 + ... + 3578536.

It is an arithmetic number, because the mean of its divisors is an integer number (277754799168).

Almost surely, 2^{1111012202221} is an apocalyptic number.

It is an amenable number.

1111012202221 is a deficient number, since it is larger than the sum of its proper divisors (6994451).

1111012202221 is an equidigital number, since it uses as much as digits as its factorization.

1111012202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994450.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1111012202221 its reverse (1222022101111), we get a palindrome (2333034303332).

The spelling of 1111012202221 in words is "one trillion, one hundred eleven billion, twelve million, two hundred two thousand, two hundred twenty-one".