1111112221012 has 6 divisors (see below), whose sum is σ = 1944446386778. Its totient is φ = 555556110504.

The previous prime is 1111112220997. The next prime is 1111112221027. The reversal of 1111112221012 is 2101222111111.

It is an interprime number because it is at equal distance from previous prime (1111112220997) and next prime (1111112221027).

It can be written as a sum of positive squares in only one way, i.e., 881168954436 + 229943266576 = 938706^2 + 479524^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138889027623 + ... + 138889027630.

Almost surely, 2^{1111112221012} is an apocalyptic number.

It is an amenable number.

1111112221012 is a deficient number, since it is larger than the sum of its proper divisors (833334165766).

1111112221012 is a wasteful number, since it uses less digits than its factorization.

1111112221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277778055257 (or 277778055255 counting only the distinct ones).

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

Adding to 1111112221012 its reverse (2101222111111), we get a palindrome (3212334332123).

The spelling of 1111112221012 in words is "one trillion, one hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, twelve".