121105142 has 8 divisors (see below), whose sum is σ = 181753416. Its totient is φ = 60520672.

The previous prime is 121105141. The next prime is 121105169. The reversal of 121105142 is 241501121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121105142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121105141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10883 + ... + 18990.

It is an arithmetic number, because the mean of its divisors is an integer number (22719177).

Almost surely, 2^121105142 is an apocalyptic number.

121105142 is a deficient number, since it is larger than the sum of its proper divisors (60648274).

121105142 is a wasteful number, since it uses less digits than its factorization.

121105142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31902.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 121105142 is about 11004.7781440609. The cubic root of 121105142 is about 494.7519649778.

Adding to 121105142 its reverse (241501121), we get a palindrome (362606263).

The spelling of 121105142 in words is "one hundred twenty-one million, one hundred five thousand, one hundred forty-two".