1220020100010 has 128 divisors (see below), whose sum is σ = 3329255520000. Its totient is φ = 317805486336.

The previous prime is 1220020099999. The next prime is 1220020100017. The reversal of 1220020100010 is 100010200221.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1220020099965 and 1220020100001.

It is not an unprimeable number, because it can be changed into a prime (1220020100017) 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, 3090841 + ... + 3463139.

It is an arithmetic number, because the mean of its divisors is an integer number (26009808750).

Almost surely, 2^{1220020100010} is an apocalyptic number.

1220020100010 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 1220020100010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664627760000).

1220020100010 is an abundant number, since it is smaller than the sum of its proper divisors (2109235419990).

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

1220020100010 is a wasteful number, since it uses less digits than its factorization.

1220020100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372597 (or 372591 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1220020100010 its reverse (100010200221), we get a palindrome (1320030300231).

The spelling of 1220020100010 in words is "one trillion, two hundred twenty billion, twenty million, one hundred thousand, ten".