1222212220111 has 4 divisors (see below), whose sum is σ = 1222241157000. Its totient is φ = 1222183283224.

The previous prime is 1222212220093. The next prime is 1222212220139. The reversal of 1222212220111 is 1110222122221.

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

It is a cyclic number.

It is not a de Polignac number, because 1222212220111 - 2⁷ = 1222212219983 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 (1222212220171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14404996 + ... + 14489593.

It is an arithmetic number, because the mean of its divisors is an integer number (305560289250).

Almost surely, 2^{1222212220111} is an apocalyptic number.

1222212220111 is a deficient number, since it is larger than the sum of its proper divisors (28936889).

1222212220111 is an equidigital number, since it uses as much as digits as its factorization.

1222212220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28936888.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1222212220111 its reverse (1110222122221), we get a palindrome (2332434342332).

The spelling of 1222212220111 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred twenty thousand, one hundred eleven".