1223088868021 has 2 divisors, whose sum is σ = 1223088868022. Its totient is φ = 1223088868020.

The previous prime is 1223088867997. The next prime is 1223088868037. The reversal of 1223088868021 is 1208688803221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988095640900 + 234993227121 = 994030^2 + 484761^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223088868021 - 2⁵ = 1223088867989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223088868081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611544434010 + 611544434011.

It is an arithmetic number, because the mean of its divisors is an integer number (611544434011).

Almost surely, 2^{1223088868021} is an apocalyptic number.

It is an amenable number.

1223088868021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223088868021 is an equidigital number, since it uses as much as digits as its factorization.

1223088868021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 589824, while the sum is 49.

The spelling of 1223088868021 in words is "one trillion, two hundred twenty-three billion, eighty-eight million, eight hundred sixty-eight thousand, twenty-one".