1222221211111 has 8 divisors (see below), whose sum is σ = 1316501950464. Its totient is φ = 1131368862360.

The previous prime is 1222221211063. The next prime is 1222221211139. The reversal of 1222221211111 is 1111121222221.

It is a happy number.

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 1222221211111 - 2¹³ = 1222221202919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222221217111) 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, 857096911 + ... + 857098336.

It is an arithmetic number, because the mean of its divisors is an integer number (164562743808).

Almost surely, 2^{1222221211111} is an apocalyptic number.

1222221211111 is a deficient number, since it is larger than the sum of its proper divisors (94280739353).

1222221211111 is a wasteful number, since it uses less digits than its factorization.

1222221211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714195301.

The product of its digits is 64, while the sum is 19.

Adding to 1222221211111 its reverse (1111121222221), we get a palindrome (2333342433332).

The spelling of 1222221211111 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".