10890121 has 6 divisors (see below), whose sum is σ = 11970266. Its totient is φ = 9900000.

The previous prime is 10890119. The next prime is 10890127. The reversal of 10890121 is 12109801.

It can be written as a sum of positive squares in only one way, i.e., 10890000 + 121 = 3300^2 + 11^2 .

It is not a de Polignac number, because 10890121 - 2¹ = 10890119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10890092 and 10890101.

It is not an unprimeable number, because it can be changed into a prime (10890127) 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 5 ways as a sum of consecutive naturals, for example, 44880 + ... + 45121.

Almost surely, 2^10890121 is an apocalyptic number.

10890121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10890121 is a deficient number, since it is larger than the sum of its proper divisors (1080145).

10890121 is an equidigital number, since it uses as much as digits as its factorization.

10890121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90023 (or 90012 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 10890121 is about 3300.0183332824. The cubic root of 10890121 is about 221.6550183890.

Adding to 10890121 its reverse (12109801), we get a palindrome (22999922).

It can be divided in two parts, 10890 and 121, that added together give a palindrome (11011).

The spelling of 10890121 in words is "ten million, eight hundred ninety thousand, one hundred twenty-one".