121980007 has 4 divisors (see below), whose sum is σ = 123651040. Its totient is φ = 120308976.

The previous prime is 121979989. The next prime is 121980011. The reversal of 121980007 is 700089121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700089121 = 17 ⋅41181713.

It is a cyclic number.

It is not a de Polignac number, because 121980007 - 2¹¹ = 121977959 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 (121980407) 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, 835407 + ... + 835552.

It is an arithmetic number, because the mean of its divisors is an integer number (30912760).

Almost surely, 2^121980007 is an apocalyptic number.

121980007 is a deficient number, since it is larger than the sum of its proper divisors (1671033).

121980007 is an equidigital number, since it uses as much as digits as its factorization.

121980007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671032.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 121980007 is about 11044.4559395201. The cubic root of 121980007 is about 495.9404723371.

The spelling of 121980007 in words is "one hundred twenty-one million, nine hundred eighty thousand, seven".