213221311403 has 4 divisors (see below), whose sum is σ = 213306500208. Its totient is φ = 213136122600.

The previous prime is 213221311361. The next prime is 213221311441. The reversal of 213221311403 is 304113122312.

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 213221311403 - 2¹² = 213221307307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213221311463) 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, 42590648 + ... + 42595653.

It is an arithmetic number, because the mean of its divisors is an integer number (53326625052).

Almost surely, 2^213221311403 is an apocalyptic number.

213221311403 is a deficient number, since it is larger than the sum of its proper divisors (85188805).

213221311403 is an equidigital number, since it uses as much as digits as its factorization.

213221311403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85188804.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 213221311403 its reverse (304113122312), we get a palindrome (517334433715).

The spelling of 213221311403 in words is "two hundred thirteen billion, two hundred twenty-one million, three hundred eleven thousand, four hundred three".