21022212123049 has 2 divisors, whose sum is σ = 21022212123050. Its totient is φ = 21022212123048.

The previous prime is 21022212123001. The next prime is 21022212123071. The reversal of 21022212123049 is 94032121222012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20604291248025 + 417920875024 = 4539195^2 + 646468^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022212123049 - 2¹⁹ = 21022211598761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21022212123049.

It is not a weakly prime, because it can be changed into another prime (21022212123349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511106061524 + 10511106061525.

It is an arithmetic number, because the mean of its divisors is an integer number (10511106061525).

Almost surely, 2^{21022212123049} is an apocalyptic number.

It is an amenable number.

21022212123049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022212123049 is an equidigital number, since it uses as much as digits as its factorization.

21022212123049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 21022212123049 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, one hundred twenty-three thousand, forty-nine".