201121212242 has 16 divisors (see below), whose sum is σ = 310248945600. Its totient is φ = 97728401232.

The previous prime is 201121212239. The next prime is 201121212283. The reversal of 201121212242 is 242212121102.

It is a happy number.

201121212242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×201121212242² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5858813 + ... + 5893040.

It is an arithmetic number, because the mean of its divisors is an integer number (19390559100).

Almost surely, 2^201121212242 is an apocalyptic number.

201121212242 is a deficient number, since it is larger than the sum of its proper divisors (109127733358).

201121212242 is a wasteful number, since it uses less digits than its factorization.

201121212242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11752097.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 201121212242 its reverse (242212121102), we get a palindrome (443333333344).

The spelling of 201121212242 in words is "two hundred one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred forty-two".