121220107 has 2 divisors, whose sum is σ = 121220108. Its totient is φ = 121220106.

The previous prime is 121220101. The next prime is 121220117. The reversal of 121220107 is 701022121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121220107 - 2¹¹ = 121218059 is a prime.

It is not a weakly prime, because it can be changed into another prime (121220101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610053 + 60610054.

It is an arithmetic number, because the mean of its divisors is an integer number (60610054).

Almost surely, 2^121220107 is an apocalyptic number.

121220107 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220107 is an equidigital number, since it uses as much as digits as its factorization.

121220107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 121220107 is about 11010.0003178928. Note that the first 3 decimals coincide. The cubic root of 121220107 is about 494.9084713263.

Adding to 121220107 its reverse (701022121), we get a palindrome (822242228).

The spelling of 121220107 in words is "one hundred twenty-one million, two hundred twenty thousand, one hundred seven".