203220124391 has 2 divisors, whose sum is σ = 203220124392. Its totient is φ = 203220124390.

The previous prime is 203220124381. The next prime is 203220124417. The reversal of 203220124391 is 193421022302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203220124391 - 2¹⁰ = 203220123367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203220124301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101610062195 + 101610062196.

It is an arithmetic number, because the mean of its divisors is an integer number (101610062196).

Almost surely, 2^203220124391 is an apocalyptic number.

203220124391 is a deficient number, since it is larger than the sum of its proper divisors (1).

203220124391 is an equidigital number, since it uses as much as digits as its factorization.

203220124391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 203220124391 its reverse (193421022302), we get a palindrome (396641146693).

The spelling of 203220124391 in words is "two hundred three billion, two hundred twenty million, one hundred twenty-four thousand, three hundred ninety-one".