203121321043242 has 32 divisors (see below), whose sum is σ = 468784851904512. Its totient is φ = 57471219822384.

The previous prime is 203121321043229. The next prime is 203121321043283. The reversal of 203121321043242 is 242340123121302.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23476801158 + ... + 23476809809.

It is an arithmetic number, because the mean of its divisors is an integer number (14649526622016).

Almost surely, 2^{203121321043242} is an apocalyptic number.

203121321043242 is an abundant number, since it is smaller than the sum of its proper divisors (265663530861270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203121321043242 is a wasteful number, since it uses less digits than its factorization.

203121321043242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46953611082.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 203121321043242 its reverse (242340123121302), we get a palindrome (445461444164544).

The spelling of 203121321043242 in words is "two hundred three trillion, one hundred twenty-one billion, three hundred twenty-one million, forty-three thousand, two hundred forty-two".