121306147 has 2 divisors, whose sum is σ = 121306148. Its totient is φ = 121306146.

The previous prime is 121306103. The next prime is 121306153. The reversal of 121306147 is 741603121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121306147 is a prime.

It is not a weakly prime, because it can be changed into another prime (121306187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60653073 + 60653074.

It is an arithmetic number, because the mean of its divisors is an integer number (60653074).

Almost surely, 2^121306147 is an apocalyptic number.

121306147 is a deficient number, since it is larger than the sum of its proper divisors (1).

121306147 is an equidigital number, since it uses as much as digits as its factorization.

121306147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 121306147 is about 11013.9069816301. The cubic root of 121306147 is about 495.0255362128.

Adding to 121306147 its reverse (741603121), we get a palindrome (862909268).

The spelling of 121306147 in words is "one hundred twenty-one million, three hundred six thousand, one hundred forty-seven".