1222122221112 has 64 divisors (see below), whose sum is σ = 3433386862080. Its totient is φ = 359688143232.

The previous prime is 1222122221101. The next prime is 1222122221147. The reversal of 1222122221112 is 2111222212221.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85146268 + ... + 85160619.

It is an arithmetic number, because the mean of its divisors is an integer number (53646669720).

Almost surely, 2^{1222122221112} is an apocalyptic number.

1222122221112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222122221112 is an abundant number, since it is smaller than the sum of its proper divisors (2211264640968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222122221112 is a wasteful number, since it uses less digits than its factorization.

1222122221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170306932 (or 170306928 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

Adding to 1222122221112 its reverse (2111222212221), we get a palindrome (3333344433333).

The spelling of 1222122221112 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred twelve".