2127221222251 has 2 divisors, whose sum is σ = 2127221222252. Its totient is φ = 2127221222250.

The previous prime is 2127221222209. The next prime is 2127221222303. The reversal of 2127221222251 is 1522221227212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2127221222251 - 2⁷ = 2127221222123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2127221222551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063610611125 + 1063610611126.

It is an arithmetic number, because the mean of its divisors is an integer number (1063610611126).

Almost surely, 2^{2127221222251} is an apocalyptic number.

2127221222251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127221222251 is an equidigital number, since it uses as much as digits as its factorization.

2127221222251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 31.

Adding to 2127221222251 its reverse (1522221227212), we get a palindrome (3649442449463).

The spelling of 2127221222251 in words is "two trillion, one hundred twenty-seven billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred fifty-one".