1222085636856 has 48 divisors (see below), whose sum is σ = 3782646020400. Its totient is φ = 349167324672.

The previous prime is 1222085636831. The next prime is 1222085636923. The reversal of 1222085636856 is 6586365802221.

1222085636856 is a `hidden beast` number, since 1 + 2 + 2 + 20 + 8 + 563 + 6 + 8 + 56 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1212386041 + ... + 1212387048.

It is an arithmetic number, because the mean of its divisors is an integer number (78805125425).

Almost surely, 2^{1222085636856} is an apocalyptic number.

It is an amenable number.

1222085636856 is an abundant number, since it is smaller than the sum of its proper divisors (2560560383544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222085636856 is a wasteful number, since it uses less digits than its factorization.

1222085636856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424773108 (or 2424773101 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 1222085636856 in words is "one trillion, two hundred twenty-two billion, eighty-five million, six hundred thirty-six thousand, eight hundred fifty-six".