2003224120421 has 2 divisors, whose sum is σ = 2003224120422. Its totient is φ = 2003224120420.

The previous prime is 2003224120397. The next prime is 2003224120487. The reversal of 2003224120421 is 1240214223002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1506179380225 + 497044740196 = 1227265^2 + 705014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003224120421 - 2²² = 2003219926117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2003224129421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001612060210 + 1001612060211.

It is an arithmetic number, because the mean of its divisors is an integer number (1001612060211).

Almost surely, 2^{2003224120421} is an apocalyptic number.

It is an amenable number.

2003224120421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003224120421 is an equidigital number, since it uses as much as digits as its factorization.

2003224120421 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2003224120421 its reverse (1240214223002), we get a palindrome (3243438343423).

The spelling of 2003224120421 in words is "two trillion, three billion, two hundred twenty-four million, one hundred twenty thousand, four hundred twenty-one".