1112123221221 has 16 divisors (see below), whose sum is σ = 1570098600000. Its totient is φ = 697784011008.

The previous prime is 1112123221201. The next prime is 1112123221243. The reversal of 1112123221221 is 1221223212111.

It is not a de Polignac number, because 1112123221221 - 2⁷ = 1112123221093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112123221201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1757530 + ... + 2305028.

It is an arithmetic number, because the mean of its divisors is an integer number (98131162500).

Almost surely, 2^{1112123221221} is an apocalyptic number.

It is an amenable number.

1112123221221 is a deficient number, since it is larger than the sum of its proper divisors (457975378779).

1112123221221 is a wasteful number, since it uses less digits than its factorization.

1112123221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587348.

The product of its digits is 192, while the sum is 21.

Adding to 1112123221221 its reverse (1221223212111), we get a palindrome (2333346433332).

The spelling of 1112123221221 in words is "one trillion, one hundred twelve billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred twenty-one".