121240195 has 4 divisors (see below), whose sum is σ = 145488240. Its totient is φ = 96992152.

The previous prime is 121240193. The next prime is 121240211. The reversal of 121240195 is 591042121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 591042121 = 8537 ⋅69233.

It is a cyclic number.

It is not a de Polignac number, because 121240195 - 2¹ = 121240193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121240193) 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, 12124015 + ... + 12124024.

It is an arithmetic number, because the mean of its divisors is an integer number (36372060).

Almost surely, 2^121240195 is an apocalyptic number.

121240195 is a deficient number, since it is larger than the sum of its proper divisors (24248045).

121240195 is an equidigital number, since it uses as much as digits as its factorization.

121240195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24248044.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 121240195 is about 11010.9125416561. The cubic root of 121240195 is about 494.9358077490.

The spelling of 121240195 in words is "one hundred twenty-one million, two hundred forty thousand, one hundred ninety-five".