122220556864 has 56 divisors (see below), whose sum is σ = 277217111808. Its totient is φ = 52372992000.

The previous prime is 122220556849. The next prime is 122220556867. The reversal of 122220556864 is 468655022221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 122220556864.

It is not an unprimeable number, because it can be changed into a prime (122220556867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4350864 + ... + 4378864.

It is an arithmetic number, because the mean of its divisors is an integer number (4950305568).

Almost surely, 2^122220556864 is an apocalyptic number.

122220556864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

122220556864 is an abundant number, since it is smaller than the sum of its proper divisors (154996554944).

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

122220556864 is an equidigital number, since it uses as much as digits as its factorization.

122220556864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37763 (or 37753 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

The spelling of 122220556864 in words is "one hundred twenty-two billion, two hundred twenty million, five hundred fifty-six thousand, eight hundred sixty-four".