12210001056 has 72 divisors (see below), whose sum is σ = 37878763104. Its totient is φ = 3699999360.

The previous prime is 12210001049. The next prime is 12210001057. The reversal of 12210001056 is 65010001221.

12210001056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×12210001056² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12210001057) 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 11 ways as a sum of consecutive naturals, for example, 1923916 + ... + 1930251.

It is an arithmetic number, because the mean of its divisors is an integer number (526093932).

Almost surely, 2^12210001056 is an apocalyptic number.

12210001056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12210001056 is an abundant number, since it is smaller than the sum of its proper divisors (25668762048).

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

12210001056 is a wasteful number, since it uses less digits than its factorization.

12210001056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854194 (or 3854183 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 12210001056 its reverse (65010001221), we get a palindrome (77220002277).

The spelling of 12210001056 in words is "twelve billion, two hundred ten million, one thousand, fifty-six".