1220556510012 has 96 divisors (see below), whose sum is σ = 3287260168192. Its totient is φ = 345256157376.

The previous prime is 1220556510011. The next prime is 1220556510037. The reversal of 1220556510012 is 2100156550221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220556510011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38459583 + ... + 38491305.

Almost surely, 2^{1220556510012} is an apocalyptic number.

1220556510012 is a gapful number since it is divisible by the number (12) 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 1220556510012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1643630084096).

1220556510012 is an abundant number, since it is smaller than the sum of its proper divisors (2066703658180).

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

1220556510012 is a wasteful number, since it uses less digits than its factorization.

1220556510012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36287 (or 36285 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 1220556510012 in words is "one trillion, two hundred twenty billion, five hundred fifty-six million, five hundred ten thousand, twelve".