1222212020251 has 2 divisors, whose sum is σ = 1222212020252. Its totient is φ = 1222212020250.

The previous prime is 1222212020207. The next prime is 1222212020261. The reversal of 1222212020251 is 1520202122221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222212020251 - 2⁷ = 1222212020123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222212020261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611106010125 + 611106010126.

It is an arithmetic number, because the mean of its divisors is an integer number (611106010126).

Almost surely, 2^{1222212020251} is an apocalyptic number.

1222212020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222212020251 is an equidigital number, since it uses as much as digits as its factorization.

1222212020251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 1222212020251 its reverse (1520202122221), we get a palindrome (2742414142472).

The spelling of 1222212020251 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, twenty thousand, two hundred fifty-one".