21213220311003 has 8 divisors (see below), whose sum is σ = 32324907140608. Its totient is φ = 12121840177704.

The previous prime is 21213220310993. The next prime is 21213220311083. The reversal of 21213220311003 is 30011302231212.

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

It is not a de Polignac number, because 21213220311003 - 2⁶ = 21213220310939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1010153348143 = 21213220311003 / (2 + 1 + 2 + 1 + 3 + 2 + 2 + 0 + 3 + 1 + 1 + 0 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213220311083) 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, 505076674051 + ... + 505076674092.

It is an arithmetic number, because the mean of its divisors is an integer number (4040613392576).

Almost surely, 2^{21213220311003} is an apocalyptic number.

21213220311003 is a deficient number, since it is larger than the sum of its proper divisors (11111686829605).

21213220311003 is a wasteful number, since it uses less digits than its factorization.

21213220311003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010153348153.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21213220311003 its reverse (30011302231212), we get a palindrome (51224522542215).

The spelling of 21213220311003 in words is "twenty-one trillion, two hundred thirteen billion, two hundred twenty million, three hundred eleven thousand, three".