12232221110821 has 2 divisors, whose sum is σ = 12232221110822. Its totient is φ = 12232221110820.

The previous prime is 12232221110803. The next prime is 12232221110861. The reversal of 12232221110821 is 12801112223221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9200217310596 + 3032003800225 = 3033186^2 + 1741265^2 .

It is a cyclic number.

It is not a de Polignac number, because 12232221110821 - 2³⁹ = 11682465296933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12232221110821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12232221110861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6116110555410 + 6116110555411.

It is an arithmetic number, because the mean of its divisors is an integer number (6116110555411).

Almost surely, 2^{12232221110821} is an apocalyptic number.

It is an amenable number.

12232221110821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12232221110821 is an equidigital number, since it uses as much as digits as its factorization.

12232221110821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The spelling of 12232221110821 in words is "twelve trillion, two hundred thirty-two billion, two hundred twenty-one million, one hundred ten thousand, eight hundred twenty-one".