231021221222203 has 2 divisors, whose sum is σ = 231021221222204. Its totient is φ = 231021221222202.

The previous prime is 231021221222147. The next prime is 231021221222411. The reversal of 231021221222203 is 302222122120132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231021221222203 is a prime.

It is not a weakly prime, because it can be changed into another prime (231021221222903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115510610611101 + 115510610611102.

It is an arithmetic number, because the mean of its divisors is an integer number (115510610611102).

Almost surely, 2^{231021221222203} is an apocalyptic number.

231021221222203 is a deficient number, since it is larger than the sum of its proper divisors (1).

231021221222203 is an equidigital number, since it uses as much as digits as its factorization.

231021221222203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 231021221222203 its reverse (302222122120132), we get a palindrome (533243343342335).

The spelling of 231021221222203 in words is "two hundred thirty-one trillion, twenty-one billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred three".