1200212120020 has 24 divisors (see below), whose sum is σ = 2535908314464. Its totient is φ = 477139540896.

The previous prime is 1200212119991. The next prime is 1200212120021. The reversal of 1200212120020 is 200212120021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200212120021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184078354 + ... + 184084873.

It is an arithmetic number, because the mean of its divisors is an integer number (105662846436).

Almost surely, 2^{1200212120020} is an apocalyptic number.

1200212120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200212120020 is an abundant number, since it is smaller than the sum of its proper divisors (1335696194444).

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

1200212120020 is a wasteful number, since it uses less digits than its factorization.

1200212120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368163399 (or 368163397 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1200212120020 its reverse (200212120021), we get a palindrome (1400424240041).

Subtracting from 1200212120020 its reverse (200212120021), we obtain a palindrome (999999999999).

The spelling of 1200212120020 in words is "one trillion, two hundred billion, two hundred twelve million, one hundred twenty thousand, twenty".