21313100331203 has 4 divisors (see below), whose sum is σ = 21313910218080. Its totient is φ = 21312290444328.

The previous prime is 21313100331121. The next prime is 21313100331223. The reversal of 21313100331203 is 30213300131312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21313100331203 - 2⁸ = 21313100330947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313100331223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404903963 + ... + 404956596.

It is an arithmetic number, because the mean of its divisors is an integer number (5328477554520).

Almost surely, 2^{21313100331203} is an apocalyptic number.

21313100331203 is a deficient number, since it is larger than the sum of its proper divisors (809886877).

21313100331203 is an equidigital number, since it uses as much as digits as its factorization.

21313100331203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809886876.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21313100331203 its reverse (30213300131312), we get a palindrome (51526400462515).

The spelling of 21313100331203 in words is "twenty-one trillion, three hundred thirteen billion, one hundred million, three hundred thirty-one thousand, two hundred three".