121220507 has 2 divisors, whose sum is σ = 121220508. Its totient is φ = 121220506.

The previous prime is 121220479. The next prime is 121220521. The reversal of 121220507 is 705022121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121220507 - 2⁶ = 121220443 is a prime.

It is a super-2 number, since 2×121220507² = 29388822634674098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121220527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610253 + 60610254.

It is an arithmetic number, because the mean of its divisors is an integer number (60610254).

Almost surely, 2^121220507 is an apocalyptic number.

121220507 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220507 is an equidigital number, since it uses as much as digits as its factorization.

121220507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 121220507 is about 11010.0184831816. The cubic root of 121220507 is about 494.9090156892.

Adding to 121220507 its reverse (705022121), we get a palindrome (826242628).

The spelling of 121220507 in words is "one hundred twenty-one million, two hundred twenty thousand, five hundred seven".