10002020202221 has 8 divisors (see below), whose sum is σ = 10090741744440. Its totient is φ = 9913302310912.

The previous prime is 10002020202203. The next prime is 10002020202241. The reversal of 10002020202221 is 12220202020001.

It can be written as a sum of positive squares in 4 ways, for example, as 1527016275625 + 8475003926596 = 1235725^2 + 2911186^2 .

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 10002020202221 - 2³⁴ = 9984840333037 is a prime.

It is a super-3 number, since 3×10002020202221³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10002020202196 and 10002020202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002020202241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4745645 + ... + 6521133.

It is an arithmetic number, because the mean of its divisors is an integer number (1261342718055).

Almost surely, 2^{10002020202221} is an apocalyptic number.

It is an amenable number.

10002020202221 is a deficient number, since it is larger than the sum of its proper divisors (88721542219).

10002020202221 is a wasteful number, since it uses less digits than its factorization.

10002020202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825455.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 10002020202221 its reverse (12220202020001), we get a palindrome (22222222222222).

The spelling of 10002020202221 in words is "ten trillion, two billion, twenty million, two hundred two thousand, two hundred twenty-one".