1121311212213 has 4 divisors (see below), whose sum is σ = 1495081616288. Its totient is φ = 747540808140.

The previous prime is 1121311212199. The next prime is 1121311212257. The reversal of 1121311212213 is 3122121131211.

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 not a de Polignac number, because 1121311212213 - 2⁵ = 1121311212181 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 1121311212213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121311212293) 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, 186885202033 + ... + 186885202038.

It is an arithmetic number, because the mean of its divisors is an integer number (373770404072).

Almost surely, 2^{1121311212213} is an apocalyptic number.

It is an amenable number.

1121311212213 is a deficient number, since it is larger than the sum of its proper divisors (373770404075).

1121311212213 is an equidigital number, since it uses as much as digits as its factorization.

1121311212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373770404074.

The product of its digits is 144, while the sum is 21.

Adding to 1121311212213 its reverse (3122121131211), we get a palindrome (4243432343424).

The spelling of 1121311212213 in words is "one trillion, one hundred twenty-one billion, three hundred eleven million, two hundred twelve thousand, two hundred thirteen".