1112121020221 has 4 divisors (see below), whose sum is σ = 1112278931712. Its totient is φ = 1111963108732.

The previous prime is 1112121020191. The next prime is 1112121020279. The reversal of 1112121020221 is 1220201212111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1112121020221 - 2¹⁷ = 1112120889149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112121020195 and 1112121020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112121020821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78945181 + ... + 78959266.

It is an arithmetic number, because the mean of its divisors is an integer number (278069732928).

Almost surely, 2^{1112121020221} is an apocalyptic number.

It is an amenable number.

1112121020221 is a deficient number, since it is larger than the sum of its proper divisors (157911491).

1112121020221 is an equidigital number, since it uses as much as digits as its factorization.

1112121020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157911490.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1112121020221 its reverse (1220201212111), we get a palindrome (2332322232332).

The spelling of 1112121020221 in words is "one trillion, one hundred twelve billion, one hundred twenty-one million, twenty thousand, two hundred twenty-one".