131321021133 has 24 divisors (see below), whose sum is σ = 187420258080. Its totient is φ = 81768444160.

The previous prime is 131321021123. The next prime is 131321021177. The reversal of 131321021133 is 331120123131.

It is a happy number.

It is not a de Polignac number, because 131321021133 - 2⁸ = 131321020877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321021123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 464538 + ... + 691691.

It is an arithmetic number, because the mean of its divisors is an integer number (7809177420).

Almost surely, 2^131321021133 is an apocalyptic number.

It is an amenable number.

131321021133 is a deficient number, since it is larger than the sum of its proper divisors (56099236947).

131321021133 is a wasteful number, since it uses less digits than its factorization.

131321021133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156397 (or 1156380 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 131321021133 its reverse (331120123131), we get a palindrome (462441144264).

The spelling of 131321021133 in words is "one hundred thirty-one billion, three hundred twenty-one million, twenty-one thousand, one hundred thirty-three".