1311133401 has 6 divisors (see below), whose sum is σ = 1893859370. Its totient is φ = 874088928.

The previous prime is 1311133387. The next prime is 1311133433. The reversal of 1311133401 is 1043311131.

1311133401 is a `hidden beast` number, since 1 + 311 + 13 + 340 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1100912400 + 210221001 = 33180^2 + 14499^2 .

It is not a de Polignac number, because 1311133401 - 2¹⁰ = 1311132377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311133001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72840736 + ... + 72840753.

Almost surely, 2^1311133401 is an apocalyptic number.

It is an amenable number.

1311133401 is a deficient number, since it is larger than the sum of its proper divisors (582725969).

1311133401 is a wasteful number, since it uses less digits than its factorization.

1311133401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145681495 (or 145681492 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1311133401 is about 36209.5760952818. The cubic root of 1311133401 is about 1094.4996500560.

Adding to 1311133401 its reverse (1043311131), we get a palindrome (2354444532).

The spelling of 1311133401 in words is "one billion, three hundred eleven million, one hundred thirty-three thousand, four hundred one".