121520042 has 8 divisors (see below), whose sum is σ = 208320096. Its totient is φ = 52080012.

The previous prime is 121520039. The next prime is 121520053. The reversal of 121520042 is 240025121.

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 121520042.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4339988 + ... + 4340015.

It is an arithmetic number, because the mean of its divisors is an integer number (26040012).

Almost surely, 2^121520042 is an apocalyptic number.

121520042 is a deficient number, since it is larger than the sum of its proper divisors (86800054).

121520042 is an equidigital number, since it uses as much as digits as its factorization.

121520042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8680012.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 121520042 is about 11023.6129286183. The cubic root of 121520042 is about 495.3163192632.

Adding to 121520042 its reverse (240025121), we get a palindrome (361545163).

The spelling of 121520042 in words is "one hundred twenty-one million, five hundred twenty thousand, forty-two".