1213321202113 has 4 divisors (see below), whose sum is σ = 1213323747328. Its totient is φ = 1213318656900.

The previous prime is 1213321202059. The next prime is 1213321202143. The reversal of 1213321202113 is 3112021233121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213321202113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213321202143) 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, 319713 + ... + 1590238.

It is an arithmetic number, because the mean of its divisors is an integer number (303330936832).

Almost surely, 2^{1213321202113} is an apocalyptic number.

It is an amenable number.

1213321202113 is a deficient number, since it is larger than the sum of its proper divisors (2545215).

1213321202113 is an equidigital number, since it uses as much as digits as its factorization.

1213321202113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545214.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1213321202113 its reverse (3112021233121), we get a palindrome (4325342435234).

The spelling of 1213321202113 in words is "one trillion, two hundred thirteen billion, three hundred twenty-one million, two hundred two thousand, one hundred thirteen".