203231120232281 has 2 divisors, whose sum is σ = 203231120232282. Its totient is φ = 203231120232280.

The previous prime is 203231120232223. The next prime is 203231120232383. The reversal of 203231120232281 is 182232021132302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197826587927056 + 5404532305225 = 14065084^2 + 2324765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203231120232281 is a prime.

It is a super-2 number, since 2×203231120232281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203231120232221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101615560116140 + 101615560116141.

It is an arithmetic number, because the mean of its divisors is an integer number (101615560116141).

Almost surely, 2^{203231120232281} is an apocalyptic number.

It is an amenable number.

203231120232281 is a deficient number, since it is larger than the sum of its proper divisors (1).

203231120232281 is an equidigital number, since it uses as much as digits as its factorization.

203231120232281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 203231120232281 its reverse (182232021132302), we get a palindrome (385463141364583).

The spelling of 203231120232281 in words is "two hundred three trillion, two hundred thirty-one billion, one hundred twenty million, two hundred thirty-two thousand, two hundred eighty-one".