10821121 has 2 divisors, whose sum is σ = 10821122. Its totient is φ = 10821120.

The previous prime is 10821101. The next prime is 10821133. The reversal of 10821121 is 12112801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10817521 + 3600 = 3289^2 + 60^2 .

It is a cyclic number.

It is not a de Polignac number, because 10821121 - 2¹¹ = 10819073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10821095 and 10821104.

It is not a weakly prime, because it can be changed into another prime (10821101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5410560 + 5410561.

It is an arithmetic number, because the mean of its divisors is an integer number (5410561).

Almost surely, 2^10821121 is an apocalyptic number.

It is an amenable number.

10821121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10821121 is an equidigital number, since it uses as much as digits as its factorization.

10821121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 10821121 is about 3289.5472332830. The cubic root of 10821121 is about 221.1858894759.

Adding to 10821121 its reverse (12112801), we get a palindrome (22933922).

The spelling of 10821121 in words is "ten million, eight hundred twenty-one thousand, one hundred twenty-one".