121005607 has 4 divisors (see below), whose sum is σ = 121053016. Its totient is φ = 120958200.

The previous prime is 121005601. The next prime is 121005613. The reversal of 121005607 is 706500121.

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

It is an interprime number because it is at equal distance from previous prime (121005601) and next prime (121005613).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121005607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121005601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19644 + ... + 25057.

It is an arithmetic number, because the mean of its divisors is an integer number (30263254).

Almost surely, 2^121005607 is an apocalyptic number.

121005607 is a deficient number, since it is larger than the sum of its proper divisors (47409).

121005607 is an equidigital number, since it uses as much as digits as its factorization.

121005607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47408.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 121005607 is about 11000.2548606839. The cubic root of 121005607 is about 494.6163840725.

Adding to 121005607 its reverse (706500121), we get a palindrome (827505728).

The spelling of 121005607 in words is "one hundred twenty-one million, five thousand, six hundred seven".