121311313203 has 8 divisors (see below), whose sum is σ = 163964149648. Its totient is φ = 79766342784.

The previous prime is 121311313171. The next prime is 121311313223. The reversal of 121311313203 is 302313113121.

It is a happy number.

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

It is not a de Polignac number, because 121311313203 - 2⁵ = 121311313171 is a prime.

It is a super-2 number, since 2×121311313203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121311313203.

It is not an unprimeable number, because it can be changed into a prime (121311313223) 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, 276966250 + ... + 276966687.

It is an arithmetic number, because the mean of its divisors is an integer number (20495518706).

Almost surely, 2^121311313203 is an apocalyptic number.

121311313203 is a deficient number, since it is larger than the sum of its proper divisors (42652836445).

121311313203 is an equidigital number, since it uses as much as digits as its factorization.

121311313203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553933013.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 121311313203 its reverse (302313113121), we get a palindrome (423624426324).

The spelling of 121311313203 in words is "one hundred twenty-one billion, three hundred eleven million, three hundred thirteen thousand, two hundred three".