11210121 has 12 divisors (see below), whose sum is σ = 17438148. Its totient is φ = 6898464.

The previous prime is 11210117. The next prime is 11210141. The reversal of 11210121 is 12101211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1040400 + 10169721 = 1020^2 + 3189^2 .

It is not a de Polignac number, because 11210121 - 2² = 11210117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47790 + ... + 48023.

It is an arithmetic number, because the mean of its divisors is an integer number (1453179).

Almost surely, 2^11210121 is an apocalyptic number.

It is an amenable number.

11210121 is a deficient number, since it is larger than the sum of its proper divisors (6228027).

11210121 is a wasteful number, since it uses less digits than its factorization.

11210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95832 (or 95829 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 11210121 is about 3348.1518782755. The cubic root of 11210121 is about 223.8051624758.

Adding to 11210121 its reverse (12101211), we get a palindrome (23311332).

The spelling of 11210121 in words is "eleven million, two hundred ten thousand, one hundred twenty-one".