121320005 has 8 divisors (see below), whose sum is σ = 145764600. Its totient is φ = 96935616.

The previous prime is 121319999. The next prime is 121320011. The reversal of 121320005 is 500023121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121319999) and next prime (121320011).

It can be written as a sum of positive squares in 4 ways, for example, as 20638849 + 100681156 = 4543^2 + 10034^2 .

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 121320005 - 2²⁶ = 54211141 is a prime.

It is a super-2 number, since 2×121320005² = 29437087226400050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10490 + ... + 18779.

It is an arithmetic number, because the mean of its divisors is an integer number (18220575).

Almost surely, 2^121320005 is an apocalyptic number.

It is an amenable number.

121320005 is a deficient number, since it is larger than the sum of its proper divisors (24444595).

121320005 is an equidigital number, since it uses as much as digits as its factorization.

121320005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30103.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 121320005 is about 11014.5360773843. The cubic root of 121320005 is about 495.0443860481.

Adding to 121320005 its reverse (500023121), we get a palindrome (621343126).

The spelling of 121320005 in words is "one hundred twenty-one million, three hundred twenty thousand, five".