20201203021 has 4 divisors (see below), whose sum is σ = 20276300700. Its totient is φ = 20126105344.

The previous prime is 20201202991. The next prime is 20201203063. The reversal of 20201203021 is 12030210202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1098922500 + 19102280521 = 33150^2 + 138211^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201203021 - 2²³ = 20192814413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201202992 and 20201203010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201203081) 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 3 ways as a sum of consecutive naturals, for example, 37548436 + ... + 37548973.

It is an arithmetic number, because the mean of its divisors is an integer number (5069075175).

Almost surely, 2^20201203021 is an apocalyptic number.

It is an amenable number.

20201203021 is a deficient number, since it is larger than the sum of its proper divisors (75097679).

20201203021 is an equidigital number, since it uses as much as digits as its factorization.

20201203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75097678.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20201203021 its reverse (12030210202), we get a palindrome (32231413223).

The spelling of 20201203021 in words is "twenty billion, two hundred one million, two hundred three thousand, twenty-one".