1122222111012 has 36 divisors (see below), whose sum is σ = 2861831912940. Its totient is φ = 370763645952.

The previous prime is 1122222110963. The next prime is 1122222111061. The reversal of 1122222111012 is 2101112222211.

It is an interprime number because it is at equal distance from previous prime (1122222110963) and next prime (1122222111061).

It can be written as a sum of positive squares in 2 ways, for example, as 598416733476 + 523805377536 = 773574^2 + 723744^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 137928837 + ... + 137936972.

It is an arithmetic number, because the mean of its divisors is an integer number (79495330915).

Almost surely, 2^{1122222111012} is an apocalyptic number.

1122222111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1122222111012 is an abundant number, since it is smaller than the sum of its proper divisors (1739609801928).

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

1122222111012 is a wasteful number, since it uses less digits than its factorization.

1122222111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275865932 (or 275865927 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1122222111012 its reverse (2101112222211), we get a palindrome (3223334333223).

The spelling of 1122222111012 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, twelve".