1212506202656 has 144 divisors (see below), whose sum is σ = 2847364918272. Its totient is φ = 506475648000.

The previous prime is 1212506202599. The next prime is 1212506202659. The reversal of 1212506202656 is 6562026052121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1212506202659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69872381 + ... + 69889731.

It is an arithmetic number, because the mean of its divisors is an integer number (19773367488).

Almost surely, 2^{1212506202656} is an apocalyptic number.

1212506202656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212506202656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423682459136).

1212506202656 is an abundant number, since it is smaller than the sum of its proper divisors (1634858715616).

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

1212506202656 is a wasteful number, since it uses less digits than its factorization.

1212506202656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18503 (or 18488 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 1212506202656 in words is "one trillion, two hundred twelve billion, five hundred six million, two hundred two thousand, six hundred fifty-six".