2221211220020 has 48 divisors (see below), whose sum is σ = 5023594969680. Its totient is φ = 820100284416.

The previous prime is 2221211219999. The next prime is 2221211220077. The reversal of 2221211220020 is 200221121222.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 107775637264 + 2113435582756 = 328292^2 + 1453766^2 .

It is a congruent number.

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, 5550836 + ... + 5937524.

It is an arithmetic number, because the mean of its divisors is an integer number (104658228535).

Almost surely, 2^{2221211220020} is an apocalyptic number.

2221211220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221211220020 is an abundant number, since it is smaller than the sum of its proper divisors (2802383749660).

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

2221211220020 is a wasteful number, since it uses less digits than its factorization.

2221211220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408804 (or 408802 counting only the distinct ones).

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

Adding to 2221211220020 its reverse (200221121222), we get a palindrome (2421432341242).

The spelling of 2221211220020 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, twenty".