1121102021 has 4 divisors (see below), whose sum is σ = 1207340652. Its totient is φ = 1034863392.

The previous prime is 1121101997. The next prime is 1121102033. The reversal of 1121102021 is 1202011211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 230736100 + 890365921 = 15190^2 + 29839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121102021 - 2¹⁸ = 1120839877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121101993 and 1121102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121102051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43119296 + ... + 43119321.

It is an arithmetic number, because the mean of its divisors is an integer number (301835163).

Almost surely, 2^1121102021 is an apocalyptic number.

It is an amenable number.

1121102021 is a deficient number, since it is larger than the sum of its proper divisors (86238631).

1121102021 is an equidigital number, since it uses as much as digits as its factorization.

1121102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86238630.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1121102021 is about 33482.8616011236. The cubic root of 1121102021 is about 1038.8393180949.

Adding to 1121102021 its reverse (1202011211), we get a palindrome (2323113232).

The spelling of 1121102021 in words is "one billion, one hundred twenty-one million, one hundred two thousand, twenty-one".