121742195 has 4 divisors (see below), whose sum is σ = 146090640. Its totient is φ = 97393752.

The previous prime is 121742191. The next prime is 121742213. The reversal of 121742195 is 591247121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121742195 - 2² = 121742191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121742191) 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, 12174215 + ... + 12174224.

It is an arithmetic number, because the mean of its divisors is an integer number (36522660).

Almost surely, 2^121742195 is an apocalyptic number.

121742195 is a deficient number, since it is larger than the sum of its proper divisors (24348445).

121742195 is an equidigital number, since it uses as much as digits as its factorization.

121742195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24348444.

The product of its digits is 5040, while the sum is 32.

The square root of 121742195 is about 11033.6845613784. The cubic root of 121742195 is about 495.6179677802.

The spelling of 121742195 in words is "one hundred twenty-one million, seven hundred forty-two thousand, one hundred ninety-five".