2121301220020 has 12 divisors (see below), whose sum is σ = 4454732562084. Its totient is φ = 848520488000.

The previous prime is 2121301220011. The next prime is 2121301220063. The reversal of 2121301220020 is 200221031212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1589551079076 + 531750140944 = 1260774^2 + 729212^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2121301219976 and 2121301220003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53032530481 + ... + 53032530520.

It is an arithmetic number, because the mean of its divisors is an integer number (371227713507).

Almost surely, 2^{2121301220020} is an apocalyptic number.

2121301220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121301220020 is an abundant number, since it is smaller than the sum of its proper divisors (2333431342064).

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

2121301220020 is a wasteful number, since it uses less digits than its factorization.

2121301220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106065061010 (or 106065061008 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2121301220020 its reverse (200221031212), we get a palindrome (2321522251232).

The spelling of 2121301220020 in words is "two trillion, one hundred twenty-one billion, three hundred one million, two hundred twenty thousand, twenty".