20021203113103 has 4 divisors (see below), whose sum is σ = 20667048374848. Its totient is φ = 19375357851360.

The previous prime is 20021203113083. The next prime is 20021203113137. The reversal of 20021203113103 is 30131130212002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021203113103 is a prime.

It is a super-2 number, since 2×20021203113103² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021203113143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322922630826 + ... + 322922630887.

It is an arithmetic number, because the mean of its divisors is an integer number (5166762093712).

Almost surely, 2^{20021203113103} is an apocalyptic number.

20021203113103 is a deficient number, since it is larger than the sum of its proper divisors (645845261745).

20021203113103 is an equidigital number, since it uses as much as digits as its factorization.

20021203113103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645845261744.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20021203113103 its reverse (30131130212002), we get a palindrome (50152333325105).

The spelling of 20021203113103 in words is "twenty trillion, twenty-one billion, two hundred three million, one hundred thirteen thousand, one hundred three".