121212100313 has 8 divisors (see below), whose sum is σ = 131991398400. Its totient is φ = 110872773648.

The previous prime is 121212100309. The next prime is 121212100319. The reversal of 121212100313 is 313001212121.

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 121212100313 - 2² = 121212100309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121212100291 and 121212100300.

It is not an unprimeable number, because it can be changed into a prime (121212100319) 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, 109992281 + ... + 109993382.

It is an arithmetic number, because the mean of its divisors is an integer number (16498924800).

Almost surely, 2^121212100313 is an apocalyptic number.

It is an amenable number.

121212100313 is a deficient number, since it is larger than the sum of its proper divisors (10779298087).

121212100313 is a wasteful number, since it uses less digits than its factorization.

121212100313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219985711.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121212100313 its reverse (313001212121), we get a palindrome (434213312434).

The spelling of 121212100313 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred thousand, three hundred thirteen".