1101112121221 has 8 divisors (see below), whose sum is σ = 1258716899264. Its totient is φ = 943583104800.

The previous prime is 1101112121209. The next prime is 1101112121261. The reversal of 1101112121221 is 1221212111011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1101112121221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101112121195 and 1101112121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101112121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18909255 + ... + 18967396.

It is an arithmetic number, because the mean of its divisors is an integer number (157339612408).

Almost surely, 2^{1101112121221} is an apocalyptic number.

It is an amenable number.

1101112121221 is a deficient number, since it is larger than the sum of its proper divisors (157604778043).

1101112121221 is an equidigital number, since it uses as much as digits as its factorization.

1101112121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37880811.

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

Adding to 1101112121221 its reverse (1221212111011), we get a palindrome (2322324232232).

The spelling of 1101112121221 in words is "one trillion, one hundred one billion, one hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".