1220002001010 has 96 divisors (see below), whose sum is σ = 3419994417840. Its totient is φ = 299957520384.

The previous prime is 1220002000999. The next prime is 1220002001011. The reversal of 1220002001010 is 101002000221.

It can be written as a sum of positive squares in 8 ways, for example, as 439063939161 + 780938061849 = 662619^2 + 883707^2 .

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 = 1220002000983 and 1220002001001.

It is not an unprimeable number, because it can be changed into a prime (1220002001011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 394326 + ... + 1611054.

Almost surely, 2^{1220002001010} is an apocalyptic number.

1220002001010 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 1220002001010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709997208920).

1220002001010 is an abundant number, since it is smaller than the sum of its proper divisors (2199992416830).

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

1220002001010 is a wasteful number, since it uses less digits than its factorization.

1220002001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217612 (or 1217609 counting only the distinct ones).

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

Adding to 1220002001010 its reverse (101002000221), we get a palindrome (1321004001231).

The spelling of 1220002001010 in words is "one trillion, two hundred twenty billion, two million, one thousand, ten".