1210699821137 has 2 divisors, whose sum is σ = 1210699821138. Its totient is φ = 1210699821136.

The previous prime is 1210699821131. The next prime is 1210699821151. The reversal of 1210699821137 is 7311289960121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1196243125441 + 14456695696 = 1093729^2 + 120236^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210699821137 - 2⁶ = 1210699821073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210699821131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605349910568 + 605349910569.

It is an arithmetic number, because the mean of its divisors is an integer number (605349910569).

Almost surely, 2^{1210699821137} is an apocalyptic number.

It is an amenable number.

1210699821137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210699821137 is an equidigital number, since it uses as much as digits as its factorization.

1210699821137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 1210699821137 in words is "one trillion, two hundred ten billion, six hundred ninety-nine million, eight hundred twenty-one thousand, one hundred thirty-seven".