20210120222020 has 48 divisors (see below), whose sum is σ = 43593893385840. Its totient is φ = 7864553378304.

The previous prime is 20210120221999. The next prime is 20210120222029. The reversal of 20210120222020 is 2022202101202.

It can be written as a sum of positive squares in 8 ways, for example, as 598667397696 + 19611452824324 = 773736^2 + 4428482^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20210120221985 and 20210120222003.

It is not an unprimeable number, because it can be changed into a prime (20210120222029) 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, 4049242 + ... + 7537678.

It is an arithmetic number, because the mean of its divisors is an integer number (908206112205).

Almost surely, 2^{20210120222020} is an apocalyptic number.

20210120222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210120222020 is an abundant number, since it is smaller than the sum of its proper divisors (23383773163820).

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

20210120222020 is a wasteful number, since it uses less digits than its factorization.

20210120222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496312 (or 3496310 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20210120222020 its reverse (2022202101202), we get a palindrome (22232322323222).

The spelling of 20210120222020 in words is "twenty trillion, two hundred ten billion, one hundred twenty million, two hundred twenty-two thousand, twenty".