12121013 has 4 divisors (see below), whose sum is σ = 12149568. Its totient is φ = 12092460.

The previous prime is 12121009. The next prime is 12121061. The reversal of 12121013 is 31012121.

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.

It is a cyclic number.

It is not a de Polignac number, because 12121013 - 2² = 12121009 is a prime.

It is a super-2 number, since 2×12121013² = 293837912292338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120985 and 12121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121063) 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, 13631 + ... + 14492.

It is an arithmetic number, because the mean of its divisors is an integer number (3037392).

Almost surely, 2^12121013 is an apocalyptic number.

It is an amenable number.

12121013 is a deficient number, since it is larger than the sum of its proper divisors (28555).

12121013 is an equidigital number, since it uses as much as digits as its factorization.

12121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28554.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12121013 is about 3481.5245223896. The cubic root of 12121013 is about 229.7098609942.

Adding to 12121013 its reverse (31012121), we get a palindrome (43133134).

The spelling of 12121013 in words is "twelve million, one hundred twenty-one thousand, thirteen".