4220021202021 has 24 divisors (see below), whose sum is σ = 6172907886080. Its totient is φ = 2777662401696.

The previous prime is 4220021201971. The next prime is 4220021202029. The reversal of 4220021202021 is 1202021200224.

4220021202021 is a `hidden beast` number, since 422 + 0 + 0 + 21 + 20 + 202 + 1 = 666.

It is not a de Polignac number, because 4220021202021 - 2¹¹ = 4220021199973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4220021201985 and 4220021202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220021202029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46480356 + ... + 46571058.

Almost surely, 2^{4220021202021} is an apocalyptic number.

It is an amenable number.

4220021202021 is a deficient number, since it is larger than the sum of its proper divisors (1952886684059).

4220021202021 is a wasteful number, since it uses less digits than its factorization.

4220021202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156225 (or 156222 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 4220021202021 its reverse (1202021200224), we get a palindrome (5422042402245).

The spelling of 4220021202021 in words is "four trillion, two hundred twenty billion, twenty-one million, two hundred two thousand, twenty-one".