20021301103 has 4 divisors (see below), whose sum is σ = 20022783328. Its totient is φ = 20019818880.

The previous prime is 20021301077. The next prime is 20021301107. The reversal of 20021301103 is 30110312002.

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

It is a cyclic number.

It is not a de Polignac number, because 20021301103 - 2²⁹ = 19484430191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021301107) 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, 720663 + ... + 747928.

It is an arithmetic number, because the mean of its divisors is an integer number (5005695832).

Almost surely, 2^20021301103 is an apocalyptic number.

20021301103 is a deficient number, since it is larger than the sum of its proper divisors (1482225).

20021301103 is a wasteful number, since it uses less digits than its factorization.

20021301103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482224.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20021301103 its reverse (30110312002), we get a palindrome (50131613105).

The spelling of 20021301103 in words is "twenty billion, twenty-one million, three hundred one thousand, one hundred three".