121313121311 has 4 divisors (see below), whose sum is σ = 121347326472. Its totient is φ = 121278916152.

The previous prime is 121313121289. The next prime is 121313121353. The reversal of 121313121311 is 113121313121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121313121311 - 2⁶ = 121313121247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313124311) 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, 17097260 + ... + 17104353.

It is an arithmetic number, because the mean of its divisors is an integer number (30336831618).

Almost surely, 2^121313121311 is an apocalyptic number.

121313121311 is a deficient number, since it is larger than the sum of its proper divisors (34205161).

121313121311 is an equidigital number, since it uses as much as digits as its factorization.

121313121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34205160.

The product of its digits is 108, while the sum is 20.

Adding to 121313121311 its reverse (113121313121), we get a palindrome (234434434432).

The spelling of 121313121311 in words is "one hundred twenty-one billion, three hundred thirteen million, one hundred twenty-one thousand, three hundred eleven".