1213320211131 has 8 divisors (see below), whose sum is σ = 1848868893184. Its totient is φ = 693325834920.

The previous prime is 1213320211099. The next prime is 1213320211153. The reversal of 1213320211131 is 1311120233121.

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

It is not a de Polignac number, because 1213320211131 - 2⁵ = 1213320211099 is a prime.

It is a super-2 number, since 2×1213320211131² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 57777152911 = 1213320211131 / (1 + 2 + 1 + 3 + 3 + 2 + 0 + 2 + 1 + 1 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213320211098 and 1213320211107.

It is not an unprimeable number, because it can be changed into a prime (1213328211131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28888576435 + ... + 28888576476.

It is an arithmetic number, because the mean of its divisors is an integer number (231108611648).

Almost surely, 2^{1213320211131} is an apocalyptic number.

1213320211131 is a deficient number, since it is larger than the sum of its proper divisors (635548682053).

1213320211131 is an equidigital number, since it uses as much as digits as its factorization.

1213320211131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57777152921.

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

Adding to 1213320211131 its reverse (1311120233121), we get a palindrome (2524440444252).

The spelling of 1213320211131 in words is "one trillion, two hundred thirteen billion, three hundred twenty million, two hundred eleven thousand, one hundred thirty-one".