1200100020020 has 192 divisors, whose sum is σ = 2929864476672. Its totient is φ = 408614976000.

The previous prime is 1200100020011. The next prime is 1200100020037. The reversal of 1200100020020 is 200200010021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65118047 + ... + 65136473.

It is an arithmetic number, because the mean of its divisors is an integer number (15259710816).

Almost surely, 2^{1200100020020} is an apocalyptic number.

1200100020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200100020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464932238336).

1200100020020 is an abundant number, since it is smaller than the sum of its proper divisors (1729764456652).

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

1200100020020 is a wasteful number, since it uses less digits than its factorization.

1200100020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18742 (or 18740 counting only the distinct ones).

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

Adding to 1200100020020 its reverse (200200010021), we get a palindrome (1400300030041).

Subtracting from 1200100020020 its reverse (200200010021), we obtain a palindrome (999900009999).

The spelling of 1200100020020 in words is "one trillion, two hundred billion, one hundred million, twenty thousand, twenty".