203122134420421 has 4 divisors (see below), whose sum is σ = 203122177905600. Its totient is φ = 203122090935244.

The previous prime is 203122134420329. The next prime is 203122134420479. The reversal of 203122134420421 is 124024431221302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203122134420421 - 2¹⁹ = 203122133896133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203122134424421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13758781 + ... + 24403858.

It is an arithmetic number, because the mean of its divisors is an integer number (50780544476400).

Almost surely, 2^{203122134420421} is an apocalyptic number.

It is an amenable number.

203122134420421 is a deficient number, since it is larger than the sum of its proper divisors (43485179).

203122134420421 is an equidigital number, since it uses as much as digits as its factorization.

203122134420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43485178.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 203122134420421 its reverse (124024431221302), we get a palindrome (327146565641723).

The spelling of 203122134420421 in words is "two hundred three trillion, one hundred twenty-two billion, one hundred thirty-four million, four hundred twenty thousand, four hundred twenty-one".