1222022651 has 2 divisors, whose sum is σ = 1222022652. Its totient is φ = 1222022650.

The previous prime is 1222022623. The next prime is 1222022687. The reversal of 1222022651 is 1562202221.

It is a weak prime.

It is an emirp because it is prime and its reverse (1562202221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222022651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222022621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611011325 + 611011326.

It is an arithmetic number, because the mean of its divisors is an integer number (611011326).

Almost surely, 2^1222022651 is an apocalyptic number.

1222022651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222022651 is an equidigital number, since it uses as much as digits as its factorization.

1222022651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1222022651 is about 34957.4405670667. The cubic root of 1222022651 is about 1069.1199130540.

Adding to 1222022651 its reverse (1562202221), we get a palindrome (2784224872).

The spelling of 1222022651 in words is "one billion, two hundred twenty-two million, twenty-two thousand, six hundred fifty-one".