1213011211323 has 4 divisors (see below), whose sum is σ = 1617348281768. Its totient is φ = 808674140880.

The previous prime is 1213011211231. The next prime is 1213011211351. The reversal of 1213011211323 is 3231121103121.

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

It is not a de Polignac number, because 1213011211323 - 2¹⁷ = 1213011080251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213011211323.

It is not an unprimeable number, because it can be changed into a prime (1213011211123) 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, 202168535218 + ... + 202168535223.

It is an arithmetic number, because the mean of its divisors is an integer number (404337070442).

Almost surely, 2^{1213011211323} is an apocalyptic number.

1213011211323 is a deficient number, since it is larger than the sum of its proper divisors (404337070445).

1213011211323 is an equidigital number, since it uses as much as digits as its factorization.

1213011211323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404337070444.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1213011211323 its reverse (3231121103121), we get a palindrome (4444132314444).

The spelling of 1213011211323 in words is "one trillion, two hundred thirteen billion, eleven million, two hundred eleven thousand, three hundred twenty-three".