2021220010000 has 50 divisors (see below), whose sum is σ = 4893575790422. Its totient is φ = 808488000000.

The previous prime is 2021220009983. The next prime is 2021220010009. The reversal of 2021220010000 is 100221202.

It can be written as a sum of positive squares in 5 ways, for example, as 1107276361984 + 913943648016 = 1052272^2 + 956004^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (2021220010009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 101051001 + ... + 101071000.

Almost surely, 2^{2021220010000} is an apocalyptic number.

2021220010000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021220010000 is an abundant number, since it is smaller than the sum of its proper divisors (2872355780422).

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

2021220010000 is an equidigital number, since it uses as much as digits as its factorization.

2021220010000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202122029 (or 202122008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2021220010000 its reverse (100221202), we get a palindrome (2021320231202).

The spelling of 2021220010000 in words is "two trillion, twenty-one billion, two hundred twenty million, ten thousand".