21020220103 has 8 divisors (see below), whose sum is σ = 21378810960. Its totient is φ = 20661706560.

The previous prime is 21020220101. The next prime is 21020220107. The reversal of 21020220103 is 30102202012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21020220103 - 2¹ = 21020220101 is a prime.

It is a super-3 number, since 3×21020220103³ (a number of 32 digits) contains 333 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 (21020220101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889683 + ... + 913003.

It is an arithmetic number, because the mean of its divisors is an integer number (2672351370).

Almost surely, 2^21020220103 is an apocalyptic number.

21020220103 is a deficient number, since it is larger than the sum of its proper divisors (358590857).

21020220103 is a wasteful number, since it uses less digits than its factorization.

21020220103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38657.

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

Adding to 21020220103 its reverse (30102202012), we get a palindrome (51122422115).

The spelling of 21020220103 in words is "twenty-one billion, twenty million, two hundred twenty thousand, one hundred three".