1121100221021 has 4 divisors (see below), whose sum is σ = 1223018422944. Its totient is φ = 1019182019100.

The previous prime is 1121100221011. The next prime is 1121100221041. The reversal of 1121100221021 is 1201220011211.

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 1121100221021 - 2¹⁰ = 1121100219997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121100220987 and 1121100221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121100221011) 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 3 ways as a sum of consecutive naturals, for example, 50959100945 + ... + 50959100966.

It is an arithmetic number, because the mean of its divisors is an integer number (305754605736).

Almost surely, 2^{1121100221021} is an apocalyptic number.

1121100221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121100221021 is a deficient number, since it is larger than the sum of its proper divisors (101918201923).

1121100221021 is a wasteful number, since it uses less digits than its factorization.

1121100221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101918201922.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1121100221021 its reverse (1201220011211), we get a palindrome (2322320232232).

The spelling of 1121100221021 in words is "one trillion, one hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, twenty-one".