21203211103 has 8 divisors (see below), whose sum is σ = 21445838640. Its totient is φ = 20960681280.

The previous prime is 21203211077. The next prime is 21203211109. The reversal of 21203211103 is 30111230212.

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 21203211103 - 2⁹ = 21203210591 is a prime.

It is a super-2 number, since 2×21203211103² (a number of 21 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 (21203211109) 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, 468493 + ... + 511753.

It is an arithmetic number, because the mean of its divisors is an integer number (2680729830).

Almost surely, 2^21203211103 is an apocalyptic number.

21203211103 is a deficient number, since it is larger than the sum of its proper divisors (242627537).

21203211103 is an equidigital number, since it uses as much as digits as its factorization.

21203211103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48857.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21203211103 its reverse (30111230212), we get a palindrome (51314441315).

The spelling of 21203211103 in words is "twenty-one billion, two hundred three million, two hundred eleven thousand, one hundred three".