203001244421 has 4 divisors (see below), whose sum is σ = 203158733100. Its totient is φ = 202843755744.

The previous prime is 203001244417. The next prime is 203001244423. The reversal of 203001244421 is 124442100302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58820800900 + 144180443521 = 242530^2 + 379711^2 .

It is a cyclic number.

It is not a de Polignac number, because 203001244421 - 2² = 203001244417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203001244423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78742406 + ... + 78744983.

It is an arithmetic number, because the mean of its divisors is an integer number (50789683275).

Almost surely, 2^203001244421 is an apocalyptic number.

It is an amenable number.

203001244421 is a deficient number, since it is larger than the sum of its proper divisors (157488679).

203001244421 is a wasteful number, since it uses less digits than its factorization.

203001244421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157488678.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 203001244421 its reverse (124442100302), we get a palindrome (327443344723).

The spelling of 203001244421 in words is "two hundred three billion, one million, two hundred forty-four thousand, four hundred twenty-one".