10216121 has 4 divisors (see below), whose sum is σ = 10408932. Its totient is φ = 10023312.

The previous prime is 10216109. The next prime is 10216153. The reversal of 10216121 is 12161201.

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 9369721 + 846400 = 3061^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 10216121 - 2⁶ = 10216057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10216096 and 10216105.

It is not an unprimeable number, because it can be changed into a prime (10216021) 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, 96326 + ... + 96431.

It is an arithmetic number, because the mean of its divisors is an integer number (2602233).

Almost surely, 2^10216121 is an apocalyptic number.

It is an amenable number.

10216121 is a deficient number, since it is larger than the sum of its proper divisors (192811).

10216121 is an equidigital number, since it uses as much as digits as its factorization.

10216121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192810.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 10216121 is about 3196.2667285444. The cubic root of 10216121 is about 216.9844821738.

Adding to 10216121 its reverse (12161201), we get a palindrome (22377322).

The spelling of 10216121 in words is "ten million, two hundred sixteen thousand, one hundred twenty-one".