1222245155544 has 32 divisors (see below), whose sum is σ = 3492129016320. Its totient is φ = 349212901536.

The previous prime is 1222245155539. The next prime is 1222245155557. The reversal of 1222245155544 is 4455515422221.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1222245155496 and 1222245155505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3637634224 + ... + 3637634559.

It is an arithmetic number, because the mean of its divisors is an integer number (109129031760).

Almost surely, 2^{1222245155544} is an apocalyptic number.

1222245155544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1222245155544 is an abundant number, since it is smaller than the sum of its proper divisors (2269883860776).

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

1222245155544 is a wasteful number, since it uses less digits than its factorization.

1222245155544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7275268799 (or 7275268795 counting only the distinct ones).

The product of its digits is 640000, while the sum is 42.

The spelling of 1222245155544 in words is "one trillion, two hundred twenty-two billion, two hundred forty-five million, one hundred fifty-five thousand, five hundred forty-four".