1213221231213 has 8 divisors (see below), whose sum is σ = 1617935105088. Its totient is φ = 808660755744.

The previous prime is 1213221231193. The next prime is 1213221231227. The reversal of 1213221231213 is 3121321223121.

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

It is not a de Polignac number, because 1213221231213 - 2¹⁷ = 1213221100141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213221231253) 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, 38331145 + ... + 38362782.

It is an arithmetic number, because the mean of its divisors is an integer number (202241888136).

Almost surely, 2^{1213221231213} is an apocalyptic number.

It is an amenable number.

1213221231213 is a deficient number, since it is larger than the sum of its proper divisors (404713873875).

1213221231213 is an equidigital number, since it uses as much as digits as its factorization.

1213221231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76699203.

The product of its digits is 864, while the sum is 24.

Adding to 1213221231213 its reverse (3121321223121), we get a palindrome (4334542454334).

The spelling of 1213221231213 in words is "one trillion, two hundred thirteen billion, two hundred twenty-one million, two hundred thirty-one thousand, two hundred thirteen".