121920027 has 4 divisors (see below), whose sum is σ = 162560040. Its totient is φ = 81280016.

The previous prime is 121920013. The next prime is 121920049. The reversal of 121920027 is 720029121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121920027 - 2⁴ = 121920011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121919979 and 121920006.

It is not an unprimeable number, because it can be changed into a prime (121900027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20320002 + ... + 20320007.

It is an arithmetic number, because the mean of its divisors is an integer number (40640010).

Almost surely, 2^121920027 is an apocalyptic number.

121920027 is a deficient number, since it is larger than the sum of its proper divisors (40640013).

121920027 is an equidigital number, since it uses as much as digits as its factorization.

121920027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40640012.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 121920027 is about 11041.7402161072. The cubic root of 121920027 is about 495.8591710724.

Adding to 121920027 its reverse (720029121), we get a palindrome (841949148).

The spelling of 121920027 in words is "one hundred twenty-one million, nine hundred twenty thousand, twenty-seven".