13121232213 has 16 divisors (see below), whose sum is σ = 18758580480. Its totient is φ = 8128713216.

The previous prime is 13121232209. The next prime is 13121232217. The reversal of 13121232213 is 31223212131.

It is an interprime number because it is at equal distance from previous prime (13121232209) and next prime (13121232217).

It is not a de Polignac number, because 13121232213 - 2² = 13121232209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13121232213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121232217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1624320 + ... + 1632377.

It is an arithmetic number, because the mean of its divisors is an integer number (1172411280).

Almost surely, 2^13121232213 is an apocalyptic number.

It is an amenable number.

13121232213 is a deficient number, since it is larger than the sum of its proper divisors (5637348267).

13121232213 is a wasteful number, since it uses less digits than its factorization.

13121232213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256796.

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

Adding to 13121232213 its reverse (31223212131), we get a palindrome (44344444344).

The spelling of 13121232213 in words is "thirteen billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred thirteen".