1222015779441 has 20 divisors (see below), whose sum is σ = 1832266566900. Its totient is φ = 811648632096.

The previous prime is 1222015779427. The next prime is 1222015779493. The reversal of 1222015779441 is 1449775102221.

1222015779441 is a `hidden beast` number, since 12 + 2 + 20 + 1 + 577 + 9 + 4 + 41 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 740768341041 + 481247438400 = 860679^2 + 693720^2 .

It is not a de Polignac number, because 1222015779441 - 2⁵ = 1222015779409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222015779041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28020246 + ... + 28063823.

It is an arithmetic number, because the mean of its divisors is an integer number (91613328345).

Almost surely, 2^{1222015779441} is an apocalyptic number.

It is an amenable number.

1222015779441 is a deficient number, since it is larger than the sum of its proper divisors (610250787459).

1222015779441 is an equidigital number, since it uses as much as digits as its factorization.

1222015779441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56084350 (or 56084341 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 1222015779441 in words is "one trillion, two hundred twenty-two billion, fifteen million, seven hundred seventy-nine thousand, four hundred forty-one".