1220556510030 has 128 divisors (see below), whose sum is σ = 3461822945280. Its totient is φ = 273131364480.

The previous prime is 1220556510011. The next prime is 1220556510037. The reversal of 1220556510030 is 300156550221.

It is a happy number.

It is a super-2 number, since 2×1220556510030² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 1220556510030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220556510037) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 116742 + ... + 1566761.

It is an arithmetic number, because the mean of its divisors is an integer number (27045491760).

Almost surely, 2^{1220556510030} is an apocalyptic number.

1220556510030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220556510030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1730911472640).

1220556510030 is an abundant number, since it is smaller than the sum of its proper divisors (2241266435250).

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

1220556510030 is a wasteful number, since it uses less digits than its factorization.

1220556510030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683563 (or 1683537 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 1220556510030 in words is "one trillion, two hundred twenty billion, five hundred fifty-six million, five hundred ten thousand, thirty".