1212066157121 has 16 divisors (see below), whose sum is σ = 1241390924928. Its totient is φ = 1183175232000.

The previous prime is 1212066157117. The next prime is 1212066157171. The reversal of 1212066157121 is 1217516602121.

It is a cyclic number.

It is not a de Polignac number, because 1212066157121 - 2² = 1212066157117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212066157111) 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 in 15 ways as a sum of consecutive naturals, for example, 2341406 + ... + 2811816.

It is an arithmetic number, because the mean of its divisors is an integer number (77586932808).

Almost surely, 2^{1212066157121} is an apocalyptic number.

It is an amenable number.

1212066157121 is a deficient number, since it is larger than the sum of its proper divisors (29324767807).

1212066157121 is a wasteful number, since it uses less digits than its factorization.

1212066157121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470872.

The product of its (nonzero) digits is 10080, while the sum is 35.

The spelling of 1212066157121 in words is "one trillion, two hundred twelve billion, sixty-six million, one hundred fifty-seven thousand, one hundred twenty-one".