2021201221220 has 48 divisors (see below), whose sum is σ = 4277838391680. Its totient is φ = 802142182656.

The previous prime is 2021201221199. The next prime is 2021201221243. The reversal of 2021201221220 is 221221021202.

It is a happy number.

It is a super-2 number, since 2×2021201221220² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4053944 + ... + 4525136.

It is an arithmetic number, because the mean of its divisors is an integer number (89121633160).

Almost surely, 2^{2021201221220} is an apocalyptic number.

2021201221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021201221220 is an abundant number, since it is smaller than the sum of its proper divisors (2256637170460).

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

2021201221220 is a wasteful number, since it uses less digits than its factorization.

2021201221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472884 (or 472882 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2021201221220 its reverse (221221021202), we get a palindrome (2242422242422).

The spelling of 2021201221220 in words is "two trillion, twenty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty".