121640027 has 4 divisors (see below), whose sum is σ = 121761120. Its totient is φ = 121518936.

The previous prime is 121640017. The next prime is 121640047. The reversal of 121640027 is 720046121.

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 121640027 - 2¹⁰ = 121639003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121639984 and 121640011.

It is not an unprimeable number, because it can be changed into a prime (121640017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59027 + ... + 61052.

It is an arithmetic number, because the mean of its divisors is an integer number (30440280).

Almost surely, 2^121640027 is an apocalyptic number.

121640027 is a deficient number, since it is larger than the sum of its proper divisors (121093).

121640027 is a wasteful number, since it uses less digits than its factorization.

121640027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121092.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 121640027 is about 11029.0537672096. The cubic root of 121640027 is about 495.4792854658.

Adding to 121640027 its reverse (720046121), we get a palindrome (841686148).

The spelling of 121640027 in words is "one hundred twenty-one million, six hundred forty thousand, twenty-seven".