21201201003 has 8 divisors (see below), whose sum is σ = 28655504848. Its totient is φ = 13940515584.

The previous prime is 21201200987. The next prime is 21201201061. The reversal of 21201201003 is 30010210212.

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

It is not a de Polignac number, because 21201201003 - 2⁴ = 21201200987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21201201003.

It is not an unprimeable number, because it can be changed into a prime (21201201083) 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, 48404350 + ... + 48404787.

It is an arithmetic number, because the mean of its divisors is an integer number (3581938106).

Almost surely, 2^21201201003 is an apocalyptic number.

21201201003 is a deficient number, since it is larger than the sum of its proper divisors (7454303845).

21201201003 is an equidigital number, since it uses as much as digits as its factorization.

21201201003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96809213.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21201201003 its reverse (30010210212), we get a palindrome (51211411215).

The spelling of 21201201003 in words is "twenty-one billion, two hundred one million, two hundred one thousand, three".