1000211222251 has 2 divisors, whose sum is σ = 1000211222252. Its totient is φ = 1000211222250.

The previous prime is 1000211222249. The next prime is 1000211222273. The reversal of 1000211222251 is 1522221120001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1000211222251 - 2¹ = 1000211222249 is a prime.

Together with 1000211222249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1000211222551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500105611125 + 500105611126.

It is an arithmetic number, because the mean of its divisors is an integer number (500105611126).

Almost surely, 2^{1000211222251} is an apocalyptic number.

1000211222251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000211222251 is an equidigital number, since it uses as much as digits as its factorization.

1000211222251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 1000211222251 its reverse (1522221120001), we get a palindrome (2522432342252).

The spelling of 1000211222251 in words is "one trillion, two hundred eleven million, two hundred twenty-two thousand, two hundred fifty-one".