6121742252161 has 2 divisors, whose sum is σ = 6121742252162. Its totient is φ = 6121742252160.

The previous prime is 6121742252149. The next prime is 6121742252201. The reversal of 6121742252161 is 1612522471216.

It is an a-pointer prime, because the next prime (6121742252201) can be obtained adding 6121742252161 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3104799057936 + 3016943194225 = 1762044^2 + 1736935^2 .

It is a cyclic number.

It is not a de Polignac number, because 6121742252161 - 2²¹ = 6121740155009 is a prime.

It is not a weakly prime, because it can be changed into another prime (6121742253161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3060871126080 + 3060871126081.

It is an arithmetic number, because the mean of its divisors is an integer number (3060871126081).

Almost surely, 2^{6121742252161} is an apocalyptic number.

It is an amenable number.

6121742252161 is a deficient number, since it is larger than the sum of its proper divisors (1).

6121742252161 is an equidigital number, since it uses as much as digits as its factorization.

6121742252161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The spelling of 6121742252161 in words is "six trillion, one hundred twenty-one billion, seven hundred forty-two million, two hundred fifty-two thousand, one hundred sixty-one".