221223144127 has 2 divisors, whose sum is σ = 221223144128. Its totient is φ = 221223144126.

The previous prime is 221223144067. The next prime is 221223144137. The reversal of 221223144127 is 721441322122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221223144127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221223144137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611572063 + 110611572064.

It is an arithmetic number, because the mean of its divisors is an integer number (110611572064).

Almost surely, 2^221223144127 is an apocalyptic number.

221223144127 is a deficient number, since it is larger than the sum of its proper divisors (1).

221223144127 is an equidigital number, since it uses as much as digits as its factorization.

221223144127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 31.

Adding to 221223144127 its reverse (721441322122), we get a palindrome (942664466249).

The spelling of 221223144127 in words is "two hundred twenty-one billion, two hundred twenty-three million, one hundred forty-four thousand, one hundred twenty-seven".