2220202102021 has 8 divisors (see below), whose sum is σ = 2274398935704. Its totient is φ = 2166007438080.

The previous prime is 2220202101973. The next prime is 2220202102043. The reversal of 2220202102021 is 1202012020222.

It can be written as a sum of positive squares in 4 ways, for example, as 408052664100 + 1812149437921 = 638790^2 + 1346161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2220202102021 - 2⁷ = 2220202101893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2220202101986 and 2220202102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220202202021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1634385 + ... + 2666761.

It is an arithmetic number, because the mean of its divisors is an integer number (284299866963).

Almost surely, 2^{2220202102021} is an apocalyptic number.

It is an amenable number.

2220202102021 is a deficient number, since it is larger than the sum of its proper divisors (54196833683).

2220202102021 is a wasteful number, since it uses less digits than its factorization.

2220202102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084871.

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

Adding to 2220202102021 its reverse (1202012020222), we get a palindrome (3422214122243).

The spelling of 2220202102021 in words is "two trillion, two hundred twenty billion, two hundred two million, one hundred two thousand, twenty-one".