203203132442421 has 16 divisors (see below), whose sum is σ = 277289562521664. Its totient is φ = 132293891850624.

The previous prime is 203203132442411. The next prime is 203203132442437. The reversal of 203203132442421 is 124244231302302.

It is a happy number.

It is not a de Polignac number, because 203203132442421 - 2⁹ = 203203132441909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203203132442411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144697006 + ... + 146094591.

It is an arithmetic number, because the mean of its divisors is an integer number (17330597657604).

Almost surely, 2^{203203132442421} is an apocalyptic number.

It is an amenable number.

203203132442421 is a deficient number, since it is larger than the sum of its proper divisors (74086430079243).

203203132442421 is a wasteful number, since it uses less digits than its factorization.

203203132442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290797060.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 203203132442421 its reverse (124244231302302), we get a palindrome (327447363744723).

The spelling of 203203132442421 in words is "two hundred three trillion, two hundred three billion, one hundred thirty-two million, four hundred forty-two thousand, four hundred twenty-one".