20210221020220 has 96 divisors (see below), whose sum is σ = 53437934946816. Its totient is φ = 6236920416000.

The previous prime is 20210221020203. The next prime is 20210221020221. The reversal of 20210221020220 is 2202012201202.

It is a super-2 number, since 2×20210221020220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20210221020194 and 20210221020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210221020221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64812382 + ... + 65123461.

It is an arithmetic number, because the mean of its divisors is an integer number (556645155696).

Almost surely, 2^{20210221020220} is an apocalyptic number.

20210221020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210221020220 is an abundant number, since it is smaller than the sum of its proper divisors (33227713926596).

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

20210221020220 is a wasteful number, since it uses less digits than its factorization.

20210221020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129935971 (or 129935969 counting only the distinct ones).

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

Adding to 20210221020220 its reverse (2202012201202), we get a palindrome (22412233221422).

The spelling of 20210221020220 in words is "twenty trillion, two hundred ten billion, two hundred twenty-one million, twenty thousand, two hundred twenty".