203122204421 has 2 divisors, whose sum is σ = 203122204422. Its totient is φ = 203122204420.

The previous prime is 203122204381. The next prime is 203122204427. The reversal of 203122204421 is 124402221302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180196005025 + 22926199396 = 424495^2 + 151414^2 .

It is a cyclic number.

It is not a de Polignac number, because 203122204421 - 2¹⁴ = 203122188037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203122204427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101561102210 + 101561102211.

It is an arithmetic number, because the mean of its divisors is an integer number (101561102211).

Almost surely, 2^203122204421 is an apocalyptic number.

It is an amenable number.

203122204421 is a deficient number, since it is larger than the sum of its proper divisors (1).

203122204421 is an equidigital number, since it uses as much as digits as its factorization.

203122204421 is an evil number, because the sum of its binary digits is even.

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

Adding to 203122204421 its reverse (124402221302), we get a palindrome (327524425723).

The spelling of 203122204421 in words is "two hundred three billion, one hundred twenty-two million, two hundred four thousand, four hundred twenty-one".