202331041421 has 2 divisors, whose sum is σ = 202331041422. Its totient is φ = 202331041420.

The previous prime is 202331041403. The next prime is 202331041457. The reversal of 202331041421 is 124140133202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132925138921 + 69405902500 = 364589^2 + 263450^2 .

It is a cyclic number.

It is not a de Polignac number, because 202331041421 - 2²² = 202326847117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202331061421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101165520710 + 101165520711.

It is an arithmetic number, because the mean of its divisors is an integer number (101165520711).

Almost surely, 2^202331041421 is an apocalyptic number.

It is an amenable number.

202331041421 is a deficient number, since it is larger than the sum of its proper divisors (1).

202331041421 is an equidigital number, since it uses as much as digits as its factorization.

202331041421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 202331041421 its reverse (124140133202), we get a palindrome (326471174623).

The spelling of 202331041421 in words is "two hundred two billion, three hundred thirty-one million, forty-one thousand, four hundred twenty-one".