1222022136661 has 2 divisors, whose sum is σ = 1222022136662. Its totient is φ = 1222022136660.

The previous prime is 1222022136631. The next prime is 1222022136677. The reversal of 1222022136661 is 1666312202221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1126591188100 + 95430948561 = 1061410^2 + 308919^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222022136661 - 2⁹ = 1222022136149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222022136611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611011068330 + 611011068331.

It is an arithmetic number, because the mean of its divisors is an integer number (611011068331).

Almost surely, 2^{1222022136661} is an apocalyptic number.

It is an amenable number.

1222022136661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222022136661 is an equidigital number, since it uses as much as digits as its factorization.

1222022136661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

Adding to 1222022136661 its reverse (1666312202221), we get a palindrome (2888334338882).

The spelling of 1222022136661 in words is "one trillion, two hundred twenty-two billion, twenty-two million, one hundred thirty-six thousand, six hundred sixty-one".