20202011021 has 8 divisors (see below), whose sum is σ = 20487851640. Its totient is φ = 19916416512.

The previous prime is 20202010991. The next prime is 20202011069. The reversal of 20202011021 is 12011020202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3711855625 + 16490155396 = 60925^2 + 128414^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202011021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202010993 and 20202011011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202011821) 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, 107045 + ... + 227733.

It is an arithmetic number, because the mean of its divisors is an integer number (2560981455).

Almost surely, 2^20202011021 is an apocalyptic number.

It is an amenable number.

20202011021 is a deficient number, since it is larger than the sum of its proper divisors (285840619).

20202011021 is a wasteful number, since it uses less digits than its factorization.

20202011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123055.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20202011021 its reverse (12011020202), we get a palindrome (32213031223).

The spelling of 20202011021 in words is "twenty billion, two hundred two million, eleven thousand, twenty-one".