1120100221 has 4 divisors (see below), whose sum is σ = 1120708512. Its totient is φ = 1119491932.

The previous prime is 1120100087. The next prime is 1120100227. The reversal of 1120100221 is 1220010211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1220010211 = 7 ⋅174287173.

It is a cyclic number.

It is not a de Polignac number, because 1120100221 - 2⁹ = 1120099709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1120100198 and 1120100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120100227) 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, 301375 + ... + 305068.

It is an arithmetic number, because the mean of its divisors is an integer number (280177128).

Almost surely, 2^1120100221 is an apocalyptic number.

It is an amenable number.

1120100221 is a deficient number, since it is larger than the sum of its proper divisors (608291).

1120100221 is an equidigital number, since it uses as much as digits as its factorization.

1120100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608290.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1120100221 is about 33467.8983654486. The cubic root of 1120100221 is about 1038.5297954553.

Adding to 1120100221 its reverse (1220010211), we get a palindrome (2340110432).

The spelling of 1120100221 in words is "one billion, one hundred twenty million, one hundred thousand, two hundred twenty-one".