16010811012121 has 2 divisors, whose sum is σ = 16010811012122. Its totient is φ = 16010811012120.

The previous prime is 16010811012061. The next prime is 16010811012151. The reversal of 16010811012121 is 12121011801061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15993088746496 + 17722265625 = 3999136^2 + 133125^2 .

It is a cyclic number.

It is not a de Polignac number, because 16010811012121 - 2³³ = 16002221077529 is a prime.

It is not a weakly prime, because it can be changed into another prime (16010811012151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8005405506060 + 8005405506061.

It is an arithmetic number, because the mean of its divisors is an integer number (8005405506061).

Almost surely, 2^{16010811012121} is an apocalyptic number.

It is an amenable number.

16010811012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16010811012121 is an equidigital number, since it uses as much as digits as its factorization.

16010811012121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 25.

Adding to 16010811012121 its reverse (12121011801061), we get a palindrome (28131822813182).

The spelling of 16010811012121 in words is "sixteen trillion, ten billion, eight hundred eleven million, twelve thousand, one hundred twenty-one".