12210121 has 8 divisors (see below), whose sum is σ = 15223104. Its totient is φ = 9514320.

The previous prime is 12210119. The next prime is 12210137. The reversal of 12210121 is 12101221.

12210121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12210121 - 2¹ = 12210119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12210098 and 12210107.

It is not an unprimeable number, because it can be changed into a prime (12210101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79210 + ... + 79363.

It is an arithmetic number, because the mean of its divisors is an integer number (1902888).

Almost surely, 2^12210121 is an apocalyptic number.

12210121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12210121 is a deficient number, since it is larger than the sum of its proper divisors (3012983).

12210121 is a wasteful number, since it uses less digits than its factorization.

12210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158591.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 12210121 is about 3494.2983558935. The cubic root of 12210121 is about 230.2713935629.

Adding to 12210121 its reverse (12101221), we get a palindrome (24311342).

Subtracting from 12210121 its reverse (12101221), we obtain a square (108900 = 330²).

It can be divided in two parts, 1 and 2210121, that added together give a palindrome (2210122).

The spelling of 12210121 in words is "twelve million, two hundred ten thousand, one hundred twenty-one".