20021200103 has 8 divisors (see below), whose sum is σ = 20896889568. Its totient is φ = 19145944224.

The previous prime is 20021200081. The next prime is 20021200117. The reversal of 20021200103 is 30100212002.

It is a happy number.

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 20021200103 - 2³² = 15726232807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021200603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12200 + ... + 200477.

It is an arithmetic number, because the mean of its divisors is an integer number (2612111196).

Almost surely, 2^20021200103 is an apocalyptic number.

20021200103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20021200103 is a deficient number, since it is larger than the sum of its proper divisors (875689465).

20021200103 is a wasteful number, since it uses less digits than its factorization.

20021200103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216793.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20021200103 its reverse (30100212002), we get a palindrome (50121412105).

The spelling of 20021200103 in words is "twenty billion, twenty-one million, two hundred thousand, one hundred three".