1121021 has 8 divisors (see below), whose sum is σ = 1231104. Its totient is φ = 1012320.

The previous prime is 1121017. The next prime is 1121023. The reversal of 1121021 is 1201211.

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

It is a cyclic number.

It is not a de Polignac number, because 1121021 - 2² = 1121017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121023) 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, 2225 + ... + 2681.

It is an arithmetic number, because the mean of its divisors is an integer number (153888).

2^1121021 is an apocalyptic number.

1121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121021 is a deficient number, since it is larger than the sum of its proper divisors (110083).

1121021 is a wasteful number, since it uses less digits than its factorization.

1121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1121021 is about 1058.7827917000. The cubic root of 1121021 is about 103.8814292175.

Adding to 1121021 its reverse (1201211), we get a palindrome (2322232).

The spelling of 1121021 in words is "one million, one hundred twenty-one thousand, twenty-one".