1200001020210 has 160 divisors (see below), whose sum is σ = 3304572556032. Its totient is φ = 312287270400.

The previous prime is 1200001020193. The next prime is 1200001020217. The reversal of 1200001020210 is 120201000021.

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 = 1200001020192 and 1200001020201.

It is not an unprimeable number, because it can be changed into a prime (1200001020217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 41816487 + ... + 41845173.

Almost surely, 2^{1200001020210} is an apocalyptic number.

1200001020210 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 1200001020210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1652286278016).

1200001020210 is an abundant number, since it is smaller than the sum of its proper divisors (2104571535822).

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

1200001020210 is a wasteful number, since it uses less digits than its factorization.

1200001020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29950 (or 29941 counting only the distinct ones).

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

Adding to 1200001020210 its reverse (120201000021), we get a palindrome (1320202020231).

The spelling of 1200001020210 in words is "one trillion, two hundred billion, one million, twenty thousand, two hundred ten".