1121121021 has 8 divisors (see below), whose sum is σ = 1494982720. Its totient is φ = 747336672.

The previous prime is 1121121019. The next prime is 1121121103. The reversal of 1121121021 is 1201211211.

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

It is not a de Polignac number, because 1121121021 - 2¹ = 1121121019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121120988 and 1121121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121101021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46881 + ... + 66633.

It is an arithmetic number, because the mean of its divisors is an integer number (186872840).

Almost surely, 2^1121121021 is an apocalyptic number.

It is an amenable number.

1121121021 is a deficient number, since it is larger than the sum of its proper divisors (373861699).

1121121021 is a wasteful number, since it uses less digits than its factorization.

1121121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38675.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1121121021 is about 33483.1453271642. The cubic root of 1121121021 is about 1038.8451866763.

Adding to 1121121021 its reverse (1201211211), we get a palindrome (2322332232).

The spelling of 1121121021 in words is "one billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-one".