1222345556789 has 32 divisors (see below), whose sum is σ = 1431903432960. Its totient is φ = 1021766054400.

The previous prime is 1222345556777. The next prime is 1222345556879. The reversal of 1222345556789 is 9876555432221.

It is not a de Polignac number, because 1222345556789 - 2¹⁶ = 1222345491253 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222345555789) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 199368254 + ... + 199374384.

It is an arithmetic number, because the mean of its divisors is an integer number (44746982280).

Almost surely, 2^{1222345556789} is an apocalyptic number.

It is an amenable number.

1222345556789 is a deficient number, since it is larger than the sum of its proper divisors (209557876171).

1222345556789 is a wasteful number, since it uses less digits than its factorization.

1222345556789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9341.

The product of its digits is 36288000, while the sum is 59.

The spelling of 1222345556789 in words is "one trillion, two hundred twenty-two billion, three hundred forty-five million, five hundred fifty-six thousand, seven hundred eighty-nine".