20021021203 has 2 divisors, whose sum is σ = 20021021204. Its totient is φ = 20021021202.

The previous prime is 20021021177. The next prime is 20021021249. The reversal of 20021021203 is 30212012002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20021021203 - 2²⁹ = 19484150291 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021021263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010510601 + 10010510602.

It is an arithmetic number, because the mean of its divisors is an integer number (10010510602).

Almost surely, 2^20021021203 is an apocalyptic number.

20021021203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021021203 is an equidigital number, since it uses as much as digits as its factorization.

20021021203 is an evil number, because the sum of its binary digits is even.

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

Adding to 20021021203 its reverse (30212012002), we get a palindrome (50233033205).

The spelling of 20021021203 in words is "twenty billion, twenty-one million, twenty-one thousand, two hundred three".