1321131013211 has 2 divisors, whose sum is σ = 1321131013212. Its totient is φ = 1321131013210.

The previous prime is 1321131013207. The next prime is 1321131013231. The reversal of 1321131013211 is 1123101311231.

It is an a-pointer prime, because the next prime (1321131013231) can be obtained adding 1321131013211 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321131013211 - 2² = 1321131013207 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321131013231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660565506605 + 660565506606.

It is an arithmetic number, because the mean of its divisors is an integer number (660565506606).

Almost surely, 2^{1321131013211} is an apocalyptic number.

1321131013211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321131013211 is an equidigital number, since it uses as much as digits as its factorization.

1321131013211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1321131013211 its reverse (1123101311231), we get a palindrome (2444232324442).

The spelling of 1321131013211 in words is "one trillion, three hundred twenty-one billion, one hundred thirty-one million, thirteen thousand, two hundred eleven".