2121301312020 has 96 divisors (see below), whose sum is σ = 7199568109440. Its totient is φ = 514254862080.

The previous prime is 2121301312019. The next prime is 2121301312111. The reversal of 2121301312020 is 202131031212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2121301311984 and 2121301312002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178554777 + ... + 178566656.

It is an arithmetic number, because the mean of its divisors is an integer number (74995501140).

Almost surely, 2^{2121301312020} is an apocalyptic number.

2121301312020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121301312020 is an abundant number, since it is smaller than the sum of its proper divisors (5078266797420).

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

2121301312020 is a wasteful number, since it uses less digits than its factorization.

2121301312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357121462 (or 357121454 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2121301312020 its reverse (202131031212), we get a palindrome (2323432343232).

The spelling of 2121301312020 in words is "two trillion, one hundred twenty-one billion, three hundred one million, three hundred twelve thousand, twenty".