203310623341421 has 4 divisors (see below), whose sum is σ = 203312787764892. Its totient is φ = 203308458917952.

The previous prime is 203310623341417. The next prime is 203310623341481. The reversal of 203310623341421 is 124143326013302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80007121408900 + 123303501932521 = 8944670^2 + 11104211^2 .

It is a cyclic number.

It is not a de Polignac number, because 203310623341421 - 2² = 203310623341417 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 (203310623341481) 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, 1082070830 + ... + 1082258703.

It is an arithmetic number, because the mean of its divisors is an integer number (50828196941223).

Almost surely, 2^{203310623341421} is an apocalyptic number.

It is an amenable number.

203310623341421 is a deficient number, since it is larger than the sum of its proper divisors (2164423471).

203310623341421 is an equidigital number, since it uses as much as digits as its factorization.

203310623341421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164423470.

The product of its (nonzero) digits is 62208, while the sum is 35.

Adding to 203310623341421 its reverse (124143326013302), we get a palindrome (327453949354723).

The spelling of 203310623341421 in words is "two hundred three trillion, three hundred ten billion, six hundred twenty-three million, three hundred forty-one thousand, four hundred twenty-one".