121221110147 has 2 divisors, whose sum is σ = 121221110148. Its totient is φ = 121221110146.

The previous prime is 121221110107. The next prime is 121221110221. The reversal of 121221110147 is 741011122121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121221110147 - 2²² = 121216915843 is a prime.

It is a super-2 number, since 2×121221110147² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121221110107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610555073 + 60610555074.

It is an arithmetic number, because the mean of its divisors is an integer number (60610555074).

Almost surely, 2^121221110147 is an apocalyptic number.

121221110147 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221110147 is an equidigital number, since it uses as much as digits as its factorization.

121221110147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 121221110147 its reverse (741011122121), we get a palindrome (862232232268).

The spelling of 121221110147 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, one hundred forty-seven".