121311312013 has 8 divisors (see below), whose sum is σ = 123310138400. Its totient is φ = 119312812080.

The previous prime is 121311312011. The next prime is 121311312019. The reversal of 121311312013 is 310213113121.

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 121311312013 - 2¹ = 121311312011 is a prime.

It is a super-2 number, since 2×121311312013² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121311312011) 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, 734338 + ... + 884236.

It is an arithmetic number, because the mean of its divisors is an integer number (15413767300).

Almost surely, 2^121311312013 is an apocalyptic number.

It is an amenable number.

121311312013 is a deficient number, since it is larger than the sum of its proper divisors (1998826387).

121311312013 is a wasteful number, since it uses less digits than its factorization.

121311312013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163227.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 121311312013 its reverse (310213113121), we get a palindrome (431524425134).

The spelling of 121311312013 in words is "one hundred twenty-one billion, three hundred eleven million, three hundred twelve thousand, thirteen".