1311130210221 has 48 divisors (see below), whose sum is σ = 2056052404224. Its totient is φ = 800318195712.

The previous prime is 1311130210219. The next prime is 1311130210261. The reversal of 1311130210221 is 1220120311131.

1311130210221 is a `hidden beast` number, since 1 + 311 + 130 + 2 + 1 + 0 + 221 = 666.

It is not a de Polignac number, because 1311130210221 - 2¹ = 1311130210219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1311130210194 and 1311130210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311130210261) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103664920 + ... + 103677566.

It is an arithmetic number, because the mean of its divisors is an integer number (42834425088).

Almost surely, 2^{1311130210221} is an apocalyptic number.

It is an amenable number.

1311130210221 is a deficient number, since it is larger than the sum of its proper divisors (744922194003).

1311130210221 is a wasteful number, since it uses less digits than its factorization.

1311130210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19770 (or 19767 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1311130210221 its reverse (1220120311131), we get a palindrome (2531250521352).

The spelling of 1311130210221 in words is "one trillion, three hundred eleven billion, one hundred thirty million, two hundred ten thousand, two hundred twenty-one".