121970305 has 4 divisors (see below), whose sum is σ = 146364372. Its totient is φ = 97576240.

The previous prime is 121970297. The next prime is 121970309. The reversal of 121970305 is 503079121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503079121 = 37 ⋅13596733.

It can be written as a sum of positive squares in 2 ways, for example, as 21790224 + 100180081 = 4668^2 + 10009^2 .

It is not a de Polignac number, because 121970305 - 2³ = 121970297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121970309) 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, 12197026 + ... + 12197035.

It is an arithmetic number, because the mean of its divisors is an integer number (36591093).

Almost surely, 2^121970305 is an apocalyptic number.

It is an amenable number.

121970305 is a deficient number, since it is larger than the sum of its proper divisors (24394067).

121970305 is an equidigital number, since it uses as much as digits as its factorization.

121970305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24394066.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 121970305 is about 11044.0167058910. The cubic root of 121970305 is about 495.9273233461.

The spelling of 121970305 in words is "one hundred twenty-one million, nine hundred seventy thousand, three hundred five".