121220001022147 has 2 divisors, whose sum is σ = 121220001022148. Its totient is φ = 121220001022146.

The previous prime is 121220001022091. The next prime is 121220001022199. The reversal of 121220001022147 is 741220100022121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121220001022147 - 2¹¹ = 121220001020099 is a prime.

It is not a weakly prime, because it can be changed into another prime (121220001032147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610000511073 + 60610000511074.

It is an arithmetic number, because the mean of its divisors is an integer number (60610000511074).

Almost surely, 2^{121220001022147} is an apocalyptic number.

121220001022147 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220001022147 is an equidigital number, since it uses as much as digits as its factorization.

121220001022147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 121220001022147 its reverse (741220100022121), we get a palindrome (862440101044268).

The spelling of 121220001022147 in words is "one hundred twenty-one trillion, two hundred twenty billion, one million, twenty-two thousand, one hundred forty-seven".