2221032202020 has 144 divisors (see below), whose sum is σ = 7136407959408. Its totient is φ = 557203046400.

The previous prime is 2221032202013. The next prime is 2221032202021. The reversal of 2221032202020 is 202022301222.

It can be written as a sum of positive squares in 8 ways, for example, as 141327876096 + 2079704325924 = 375936^2 + 1442118^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2221032201984 and 2221032202002.

It is not an unprimeable number, because it can be changed into a prime (2221032202021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7245870 + ... + 7546170.

It is an arithmetic number, because the mean of its divisors is an integer number (49558388607).

Almost surely, 2^{2221032202020} is an apocalyptic number.

2221032202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221032202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3568203979704).

2221032202020 is an abundant number, since it is smaller than the sum of its proper divisors (4915375757388).

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

2221032202020 is a wasteful number, since it uses less digits than its factorization.

2221032202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302750 (or 302745 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 2221032202020 its reverse (202022301222), we get a palindrome (2423054503242).

The spelling of 2221032202020 in words is "two trillion, two hundred twenty-one billion, thirty-two million, two hundred two thousand, twenty".