1220556510044 has 12 divisors (see below), whose sum is σ = 2137543317168. Its totient is φ = 609829848000.

The previous prime is 1220556510037. The next prime is 1220556510049. The reversal of 1220556510044 is 4400156550221.

It is a junction number, because it is equal to n+sod(n) for n = 1220556509986 and 1220556510013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220556510049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112095632 + ... + 112106519.

It is an arithmetic number, because the mean of its divisors is an integer number (178128609764).

Almost surely, 2^{1220556510044} is an apocalyptic number.

It is an amenable number.

1220556510044 is a deficient number, since it is larger than the sum of its proper divisors (916986807124).

1220556510044 is a wasteful number, since it uses less digits than its factorization.

1220556510044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224203516 (or 224203514 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 1220556510044 in words is "one trillion, two hundred twenty billion, five hundred fifty-six million, five hundred ten thousand, forty-four".