201242122 has 8 divisors (see below), whose sum is σ = 304632900. Its totient is φ = 99697824.

The previous prime is 201242033. The next prime is 201242131. The reversal of 201242122 is 221242102.

It can be written as a sum of positive squares in 2 ways, for example, as 193182201 + 8059921 = 13899^2 + 2839^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 201242096 and 201242105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461347 + ... + 461782.

Almost surely, 2^201242122 is an apocalyptic number.

201242122 is a deficient number, since it is larger than the sum of its proper divisors (103390778).

201242122 is a wasteful number, since it uses less digits than its factorization.

201242122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923240.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 201242122 is about 14185.9832933780. The cubic root of 201242122 is about 586.0117121912.

Adding to 201242122 its reverse (221242102), we get a palindrome (422484224).

The spelling of 201242122 in words is "two hundred one million, two hundred forty-two thousand, one hundred twenty-two".