12121021759061 has 2 divisors, whose sum is σ = 12121021759062. Its totient is φ = 12121021759060.

The previous prime is 12121021759057. The next prime is 12121021759087. The reversal of 12121021759061 is 16095712012121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11890531510225 + 230490248836 = 3448265^2 + 480094^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121021759061 - 2² = 12121021759057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121021759361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060510879530 + 6060510879531.

It is an arithmetic number, because the mean of its divisors is an integer number (6060510879531).

Almost surely, 2^{12121021759061} is an apocalyptic number.

It is an amenable number.

12121021759061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121021759061 is an equidigital number, since it uses as much as digits as its factorization.

12121021759061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 38.

The spelling of 12121021759061 in words is "twelve trillion, one hundred twenty-one billion, twenty-one million, seven hundred fifty-nine thousand, sixty-one".