1200121321230 has 96 divisors (see below), whose sum is σ = 3363546513600. Its totient is φ = 295132561920.

The previous prime is 1200121321211. The next prime is 1200121321247. The reversal of 1200121321230 is 321231210021.

1200121321230 is a `hidden beast` number, since 1 + 200 + 1 + 213 + 21 + 230 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 738415 + ... + 1716245.

It is an arithmetic number, because the mean of its divisors is an integer number (35036942850).

Almost surely, 2^{1200121321230} is an apocalyptic number.

1200121321230 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 1200121321230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1681773256800).

1200121321230 is an abundant number, since it is smaller than the sum of its proper divisors (2163425192370).

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

1200121321230 is a wasteful number, since it uses less digits than its factorization.

1200121321230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978906 (or 978903 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1200121321230 its reverse (321231210021), we get a palindrome (1521352531251).

The spelling of 1200121321230 in words is "one trillion, two hundred billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred thirty".