1222715473777 has 4 divisors (see below), whose sum is σ = 1397389112896. Its totient is φ = 1048041834660.

The previous prime is 1222715473769. The next prime is 1222715473831. The reversal of 1222715473777 is 7773745172221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1222715473777 - 2³ = 1222715473769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222715473717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87336819549 + ... + 87336819562.

It is an arithmetic number, because the mean of its divisors is an integer number (349347278224).

Almost surely, 2^{1222715473777} is an apocalyptic number.

It is an amenable number.

1222715473777 is a deficient number, since it is larger than the sum of its proper divisors (174673639119).

1222715473777 is an equidigital number, since it uses as much as digits as its factorization.

1222715473777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174673639118.

The product of its digits is 8067360, while the sum is 55.

The spelling of 1222715473777 in words is "one trillion, two hundred twenty-two billion, seven hundred fifteen million, four hundred seventy-three thousand, seven hundred seventy-seven".