221000122127 has 2 divisors, whose sum is σ = 221000122128. Its totient is φ = 221000122126.

The previous prime is 221000122117. The next prime is 221000122139. The reversal of 221000122127 is 721221000122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221000122127 - 2³⁴ = 203820252943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221000122099 and 221000122108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221000122117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500061063 + 110500061064.

It is an arithmetic number, because the mean of its divisors is an integer number (110500061064).

Almost surely, 2^221000122127 is an apocalyptic number.

221000122127 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000122127 is an equidigital number, since it uses as much as digits as its factorization.

221000122127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 221000122127 its reverse (721221000122), we get a palindrome (942221122249).

The spelling of 221000122127 in words is "two hundred twenty-one billion, one hundred twenty-two thousand, one hundred twenty-seven".