21020303210203 has 16 divisors (see below), whose sum is σ = 23316045151104. Its totient is φ = 18789738327360.

The previous prime is 21020303210191. The next prime is 21020303210239. The reversal of 21020303210203 is 30201230302012.

It is not a de Polignac number, because 21020303210203 - 2¹³ = 21020303202011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020303210273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25667650 + ... + 26473927.

It is an arithmetic number, because the mean of its divisors is an integer number (1457252821944).

Almost surely, 2^{21020303210203} is an apocalyptic number.

21020303210203 is a deficient number, since it is larger than the sum of its proper divisors (2295741940901).

21020303210203 is a wasteful number, since it uses less digits than its factorization.

21020303210203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52142202.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21020303210203 its reverse (30201230302012), we get a palindrome (51221533512215).

The spelling of 21020303210203 in words is "twenty-one trillion, twenty billion, three hundred three million, two hundred ten thousand, two hundred three".