203121004242 has 32 divisors (see below), whose sum is σ = 437513952960. Its totient is φ = 62495547840.

The previous prime is 203121004231. The next prime is 203121004267. The reversal of 203121004242 is 242400121302.

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, 1778317 + ... + 1889087.

It is an arithmetic number, because the mean of its divisors is an integer number (13672311030).

Almost surely, 2^203121004242 is an apocalyptic number.

203121004242 is an abundant number, since it is smaller than the sum of its proper divisors (234392948718).

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

203121004242 is a wasteful number, since it uses less digits than its factorization.

203121004242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134298.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 203121004242 its reverse (242400121302), we get a palindrome (445521125544).

The spelling of 203121004242 in words is "two hundred three billion, one hundred twenty-one million, four thousand, two hundred forty-two".