121201442 has 4 divisors (see below), whose sum is σ = 181802166. Its totient is φ = 60600720.

The previous prime is 121201433. The next prime is 121201471. The reversal of 121201442 is 244102121.

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

It can be written as a sum of positive squares in only one way, i.e., 117700801 + 3500641 = 10849^2 + 1871^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121201442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30300359 + ... + 30300362.

Almost surely, 2^121201442 is an apocalyptic number.

121201442 is a deficient number, since it is larger than the sum of its proper divisors (60600724).

121201442 is an equidigital number, since it uses as much as digits as its factorization.

121201442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60600723.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 121201442 is about 11009.1526467753. The cubic root of 121201442 is about 494.8830686628.

Adding to 121201442 its reverse (244102121), we get a palindrome (365303563).

The spelling of 121201442 in words is "one hundred twenty-one million, two hundred one thousand, four hundred forty-two".