9120020012161 has 2 divisors, whose sum is σ = 9120020012162. Its totient is φ = 9120020012160.

The previous prime is 9120020012119. The next prime is 9120020012261. The reversal of 9120020012161 is 1612100200219.

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., 7048812601600 + 2071207410561 = 2654960^2 + 1439169^2 .

It is a cyclic number.

It is not a de Polignac number, because 9120020012161 - 2²¹ = 9120017915009 is a prime.

It is not a weakly prime, because it can be changed into another prime (9120020012101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560010006080 + 4560010006081.

It is an arithmetic number, because the mean of its divisors is an integer number (4560010006081).

Almost surely, 2^{9120020012161} is an apocalyptic number.

It is an amenable number.

9120020012161 is a deficient number, since it is larger than the sum of its proper divisors (1).

9120020012161 is an equidigital number, since it uses as much as digits as its factorization.

9120020012161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 9120020012161 in words is "nine trillion, one hundred twenty billion, twenty million, twelve thousand, one hundred sixty-one".