1311142033221 has 16 divisors (see below), whose sum is σ = 1852580842560. Its totient is φ = 823369258880.

The previous prime is 1311142033171. The next prime is 1311142033231. The reversal of 1311142033221 is 1223302411131.

It is a cyclic number.

It is not a de Polignac number, because 1311142033221 - 2⁹ = 1311142032709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311142033191 and 1311142033200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311142033231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183784215 + ... + 183791348.

It is an arithmetic number, because the mean of its divisors is an integer number (115786302660).

Almost surely, 2^{1311142033221} is an apocalyptic number.

It is an amenable number.

1311142033221 is a deficient number, since it is larger than the sum of its proper divisors (541438809339).

1311142033221 is a wasteful number, since it uses less digits than its factorization.

1311142033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367575636.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1311142033221 its reverse (1223302411131), we get a palindrome (2534444444352).

The spelling of 1311142033221 in words is "one trillion, three hundred eleven billion, one hundred forty-two million, thirty-three thousand, two hundred twenty-one".