1331213213311 has 4 divisors (see below), whose sum is σ = 1331274040632. Its totient is φ = 1331152385992.

The previous prime is 1331213213263. The next prime is 1331213213329. The reversal of 1331213213311 is 1133123121331.

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

It is a cyclic number.

It is not a de Polignac number, because 1331213213311 - 2²¹ = 1331211116159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331213213411) 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, 30380821 + ... + 30424606.

It is an arithmetic number, because the mean of its divisors is an integer number (332818510158).

Almost surely, 2^{1331213213311} is an apocalyptic number.

1331213213311 is a deficient number, since it is larger than the sum of its proper divisors (60827321).

1331213213311 is an equidigital number, since it uses as much as digits as its factorization.

1331213213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60827320.

The product of its digits is 972, while the sum is 25.

Adding to 1331213213311 its reverse (1133123121331), we get a palindrome (2464336334642).

The spelling of 1331213213311 in words is "one trillion, three hundred thirty-one billion, two hundred thirteen million, two hundred thirteen thousand, three hundred eleven".