120671111121637 has 2 divisors, whose sum is σ = 120671111121638. Its totient is φ = 120671111121636.

The previous prime is 120671111121571. The next prime is 120671111121647. The reversal of 120671111121637 is 736121111176021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105121015145316 + 15550095976321 = 10252854^2 + 3943361^2 .

It is an emirp because it is prime and its reverse (736121111176021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120671111121637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120671111121637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120671111121647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60335555560818 + 60335555560819.

It is an arithmetic number, because the mean of its divisors is an integer number (60335555560819).

Almost surely, 2^{120671111121637} is an apocalyptic number.

It is an amenable number.

120671111121637 is a deficient number, since it is larger than the sum of its proper divisors (1).

120671111121637 is an equidigital number, since it uses as much as digits as its factorization.

120671111121637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 40.

Adding to 120671111121637 its reverse (736121111176021), we get a palindrome (856792222297658).

The spelling of 120671111121637 in words is "one hundred twenty trillion, six hundred seventy-one billion, one hundred eleven million, one hundred twenty-one thousand, six hundred thirty-seven".