2131297012549 has 2 divisors, whose sum is σ = 2131297012550. Its totient is φ = 2131297012548.

The previous prime is 2131297012543. The next prime is 2131297012573. The reversal of 2131297012549 is 9452107921312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1381588668100 + 749708344449 = 1175410^2 + 865857^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131297012549 - 2¹¹ = 2131297010501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131297012499 and 2131297012508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131297012543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065648506274 + 1065648506275.

It is an arithmetic number, because the mean of its divisors is an integer number (1065648506275).

Almost surely, 2^{2131297012549} is an apocalyptic number.

It is an amenable number.

2131297012549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131297012549 is an equidigital number, since it uses as much as digits as its factorization.

2131297012549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 2131297012549 in words is "two trillion, one hundred thirty-one billion, two hundred ninety-seven million, twelve thousand, five hundred forty-nine".