11010121 has 4 divisors (see below), whose sum is σ = 11020752. Its totient is φ = 10999492.

The previous prime is 11010113. The next prime is 11010149. The reversal of 11010121 is 12101011.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12101011 = 13 ⋅930847.

It is a cyclic number.

It is not a de Polignac number, because 11010121 - 2³ = 11010113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11010421) 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, 3571 + ... + 5896.

It is an arithmetic number, because the mean of its divisors is an integer number (2755188).

Almost surely, 2^11010121 is an apocalyptic number.

It is an amenable number.

11010121 is a deficient number, since it is larger than the sum of its proper divisors (10631).

11010121 is an equidigital number, since it uses as much as digits as its factorization.

11010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10630.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 11010121 is about 3318.1502377078. The cubic root of 11010121 is about 222.4661969436.

Adding to 11010121 its reverse (12101011), we get a palindrome (23111132).

Multiplying 11010121 by its reverse (12101011), we get a palindrome (133233595332331).

The spelling of 11010121 in words is "eleven million, ten thousand, one hundred twenty-one".