121930005 has 8 divisors (see below), whose sum is σ = 195088032. Its totient is φ = 65029328.

The previous prime is 121929989. The next prime is 121930009. The reversal of 121930005 is 500039121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121930005 - 2⁴ = 121929989 is a prime.

It is a super-2 number, since 2×121930005² = 29733852238600050, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121930009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4064319 + ... + 4064348.

It is an arithmetic number, because the mean of its divisors is an integer number (24386004).

Almost surely, 2^121930005 is an apocalyptic number.

121930005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121930005 is a deficient number, since it is larger than the sum of its proper divisors (73158027).

121930005 is an equidigital number, since it uses as much as digits as its factorization.

121930005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8128675.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 121930005 is about 11042.1920378157. The cubic root of 121930005 is about 495.8726978296.

Adding to 121930005 its reverse (500039121), we get a palindrome (621969126).

The spelling of 121930005 in words is "one hundred twenty-one million, nine hundred thirty thousand, five".