1222121110111 has 8 divisors (see below), whose sum is σ = 1346423258448. Its totient is φ = 1100019000000.

The previous prime is 1222121110081. The next prime is 1222121110141. The reversal of 1222121110111 is 1110111212221.

It is an interprime number because it is at equal distance from previous prime (1222121110081) and next prime (1222121110141).

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 1222121110111 - 2⁷ = 1222121109983 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 (1222121110141) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 550008390 + ... + 550010611.

It is an arithmetic number, because the mean of its divisors is an integer number (168302907306).

Almost surely, 2^{1222121110111} is an apocalyptic number.

1222121110111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222121110111 is a deficient number, since it is larger than the sum of its proper divisors (124302148337).

1222121110111 is a wasteful number, since it uses less digits than its factorization.

1222121110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100019113.

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

Adding to 1222121110111 its reverse (1110111212221), we get a palindrome (2332232322332).

The spelling of 1222121110111 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred ten thousand, one hundred eleven".