1021121 has 4 divisors (see below), whose sum is σ = 1044912. Its totient is φ = 997332.

The previous prime is 1021093. The next prime is 1021123. The reversal of 1021121 is 1211201.

1021121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1021121 - 2¹⁴ = 1004737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021099 and 1021108.

It is not an unprimeable number, because it can be changed into a prime (1021123) 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, 11831 + ... + 11916.

It is an arithmetic number, because the mean of its divisors is an integer number (261228).

2^1021121 is an apocalyptic number.

It is an amenable number.

1021121 is a deficient number, since it is larger than the sum of its proper divisors (23791).

1021121 is an equidigital number, since it uses as much as digits as its factorization.

1021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23790.

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

The square root of 1021121 is about 1010.5053191349. The cubic root of 1021121 is about 100.6991340581.

Adding to 1021121 its reverse (1211201), we get a palindrome (2232322).

The spelling of 1021121 in words is "one million, twenty-one thousand, one hundred twenty-one".