11112221012 has 12 divisors (see below), whose sum is σ = 20291882016. Its totient is φ = 5314540440.

The previous prime is 11112220993. The next prime is 11112221039. The reversal of 11112221012 is 21012221111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60392414 + ... + 60392597.

It is an arithmetic number, because the mean of its divisors is an integer number (1690990168).

Almost surely, 2^11112221012 is an apocalyptic number.

It is an amenable number.

11112221012 is a deficient number, since it is larger than the sum of its proper divisors (9179661004).

11112221012 is a wasteful number, since it uses less digits than its factorization.

11112221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120785038 (or 120785036 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11112221012 its reverse (21012221111), we get a palindrome (32124442123).

Subtracting 11112221012 from its reverse (21012221111), we obtain a palindrome (9900000099).

The spelling of 11112221012 in words is "eleven billion, one hundred twelve million, two hundred twenty-one thousand, twelve".