1110112131221 has 2 divisors, whose sum is σ = 1110112131222. Its totient is φ = 1110112131220.

The previous prime is 1110112131211. The next prime is 1110112131241. The reversal of 1110112131221 is 1221312110111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1108779516196 + 1332615025 = 1052986^2 + 36505^2 .

It is an emirp because it is prime and its reverse (1221312110111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1110112131221 - 2³⁰ = 1109038389397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1110112131221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110112131211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555056065610 + 555056065611.

It is an arithmetic number, because the mean of its divisors is an integer number (555056065611).

Almost surely, 2^{1110112131221} is an apocalyptic number.

It is an amenable number.

1110112131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110112131221 is an equidigital number, since it uses as much as digits as its factorization.

1110112131221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1110112131221 its reverse (1221312110111), we get a palindrome (2331424241332).

The spelling of 1110112131221 in words is "one trillion, one hundred ten billion, one hundred twelve million, one hundred thirty-one thousand, two hundred twenty-one".