121310312020 has 24 divisors (see below), whose sum is σ = 254803651200. Its totient is φ = 48514220832.

The previous prime is 121310312017. The next prime is 121310312023. The reversal of 121310312020 is 20213013121.

It is an interprime number because it is at equal distance from previous prime (121310312017) and next prime (121310312023).

It is a junction number, because it is equal to n+sod(n) for n = 121310311985 and 121310312003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121310312023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518160 + ... + 714919.

It is an arithmetic number, because the mean of its divisors is an integer number (10616818800).

Almost surely, 2^121310312020 is an apocalyptic number.

121310312020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121310312020 is an abundant number, since it is smaller than the sum of its proper divisors (133493339180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121310312020 is a wasteful number, since it uses less digits than its factorization.

121310312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238007 (or 1238005 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 121310312020 its reverse (20213013121), we get a palindrome (141523325141).

The spelling of 121310312020 in words is "one hundred twenty-one billion, three hundred ten million, three hundred twelve thousand, twenty".