1111211021222 has 4 divisors (see below), whose sum is σ = 1666816531836. Its totient is φ = 555605510610.

The previous prime is 1111211021201. The next prime is 1111211021231. The reversal of 1111211021222 is 2221201121111.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1111211021222.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 277802755304 + ... + 277802755307.

It is an arithmetic number, because the mean of its divisors is an integer number (416704132959).

Almost surely, 2^{1111211021222} is an apocalyptic number.

1111211021222 is a deficient number, since it is larger than the sum of its proper divisors (555605510614).

1111211021222 is an equidigital number, since it uses as much as digits as its factorization.

1111211021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555605510613.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1111211021222 its reverse (2221201121111), we get a palindrome (3332412142333).

The spelling of 1111211021222 in words is "one trillion, one hundred eleven billion, two hundred eleven million, twenty-one thousand, two hundred twenty-two".