203201431401421 has 2 divisors, whose sum is σ = 203201431401422. Its totient is φ = 203201431401420.

The previous prime is 203201431401403. The next prime is 203201431401431. The reversal of 203201431401421 is 124104134102302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187582771719396 + 15618659682025 = 13696086^2 + 3952045^2 .

It is a cyclic number.

It is not a de Polignac number, because 203201431401421 - 2²⁷ = 203201297183693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203201431401421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203201431401431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101600715700710 + 101600715700711.

It is an arithmetic number, because the mean of its divisors is an integer number (101600715700711).

Almost surely, 2^{203201431401421} is an apocalyptic number.

It is an amenable number.

203201431401421 is a deficient number, since it is larger than the sum of its proper divisors (1).

203201431401421 is an equidigital number, since it uses as much as digits as its factorization.

203201431401421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 203201431401421 its reverse (124104134102302), we get a palindrome (327305565503723).

The spelling of 203201431401421 in words is "two hundred three trillion, two hundred one billion, four hundred thirty-one million, four hundred one thousand, four hundred twenty-one".