121210013 has 8 divisors (see below), whose sum is σ = 123590400. Its totient is φ = 118840608.

The previous prime is 121210007. The next prime is 121210021. The reversal of 121210013 is 310012121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121210013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121209976 and 121210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210213) 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, 21620 + ... + 26642.

It is an arithmetic number, because the mean of its divisors is an integer number (15448800).

Almost surely, 2^121210013 is an apocalyptic number.

It is an amenable number.

121210013 is a deficient number, since it is larger than the sum of its proper divisors (2380387).

121210013 is an equidigital number, since it uses as much as digits as its factorization.

121210013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491.

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

The square root of 121210013 is about 11009.5419069097. The cubic root of 121210013 is about 494.8947339332.

Adding to 121210013 its reverse (310012121), we get a palindrome (431222134).

The spelling of 121210013 in words is "one hundred twenty-one million, two hundred ten thousand, thirteen".