203042213421 has 8 divisors (see below), whose sum is σ = 286647830784. Its totient is φ = 127399035840.

The previous prime is 203042213417. The next prime is 203042213441. The reversal of 203042213421 is 124312240302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 203042213421 - 2² = 203042213417 is a prime.

It is a super-2 number, since 2×203042213421² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 203042213391 and 203042213400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203042213401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1990609885 + ... + 1990609986.

It is an arithmetic number, because the mean of its divisors is an integer number (35830978848).

Almost surely, 2^203042213421 is an apocalyptic number.

It is an amenable number.

203042213421 is a deficient number, since it is larger than the sum of its proper divisors (83605617363).

203042213421 is a wasteful number, since it uses less digits than its factorization.

203042213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981219891.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 203042213421 its reverse (124312240302), we get a palindrome (327354453723).

The spelling of 203042213421 in words is "two hundred three billion, forty-two million, two hundred thirteen thousand, four hundred twenty-one".