12220100012161 has 2 divisors, whose sum is σ = 12220100012162. Its totient is φ = 12220100012160.

The previous prime is 12220100012147. The next prime is 12220100012221. The reversal of 12220100012161 is 16121000102221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11143953121536 + 1076146890625 = 3338256^2 + 1037375^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220100012161 - 2¹⁵ = 12220099979393 is a prime.

It is not a weakly prime, because it can be changed into another prime (12220100012101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110050006080 + 6110050006081.

It is an arithmetic number, because the mean of its divisors is an integer number (6110050006081).

Almost surely, 2^{12220100012161} is an apocalyptic number.

It is an amenable number.

12220100012161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220100012161 is an equidigital number, since it uses as much as digits as its factorization.

12220100012161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12220100012161 its reverse (16121000102221), we get a palindrome (28341100114382).

The spelling of 12220100012161 in words is "twelve trillion, two hundred twenty billion, one hundred million, twelve thousand, one hundred sixty-one".