1221022022279 has 2 divisors, whose sum is σ = 1221022022280. Its totient is φ = 1221022022278.

The previous prime is 1221022022201. The next prime is 1221022022309. The reversal of 1221022022279 is 9722202201221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221022022279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221022024279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610511011139 + 610511011140.

It is an arithmetic number, because the mean of its divisors is an integer number (610511011140).

Almost surely, 2^{1221022022279} is an apocalyptic number.

1221022022279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221022022279 is an equidigital number, since it uses as much as digits as its factorization.

1221022022279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 1221022022279 in words is "one trillion, two hundred twenty-one billion, twenty-two million, twenty-two thousand, two hundred seventy-nine".