203214434321 has 2 divisors, whose sum is σ = 203214434322. Its totient is φ = 203214434320.

The previous prime is 203214434299. The next prime is 203214434329. The reversal of 203214434321 is 123434412302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187822558225 + 15391876096 = 433385^2 + 124064^2 .

It is a cyclic number.

It is not a de Polignac number, because 203214434321 - 2¹⁴ = 203214417937 is a prime.

It is a super-2 number, since 2×203214434321² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203214434329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101607217160 + 101607217161.

It is an arithmetic number, because the mean of its divisors is an integer number (101607217161).

Almost surely, 2^203214434321 is an apocalyptic number.

It is an amenable number.

203214434321 is a deficient number, since it is larger than the sum of its proper divisors (1).

203214434321 is an equidigital number, since it uses as much as digits as its factorization.

203214434321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 203214434321 its reverse (123434412302), we get a palindrome (326648846623).

The spelling of 203214434321 in words is "two hundred three billion, two hundred fourteen million, four hundred thirty-four thousand, three hundred twenty-one".