2020120021321 has 16 divisors (see below), whose sum is σ = 2057164650000. Its totient is φ = 1983205785600.

The previous prime is 2020120021319. The next prime is 2020120021399. The reversal of 2020120021321 is 1231200210202.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1050141255696 + 969978765625 = 1024764^2 + 984875^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020120021321 - 2¹ = 2020120021319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020120021295 and 2020120021304.

It is not an unprimeable number, because it can be changed into a prime (2020120021301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70765311 + ... + 70793851.

It is an arithmetic number, because the mean of its divisors is an integer number (128572790625).

Almost surely, 2^{2020120021321} is an apocalyptic number.

It is an amenable number.

2020120021321 is a deficient number, since it is larger than the sum of its proper divisors (37044628679).

2020120021321 is a wasteful number, since it uses less digits than its factorization.

2020120021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30780.

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

Adding to 2020120021321 its reverse (1231200210202), we get a palindrome (3251320231523).

The spelling of 2020120021321 in words is "two trillion, twenty billion, one hundred twenty million, twenty-one thousand, three hundred twenty-one".