1200123321210 has 96 divisors (see below), whose sum is σ = 3405858513408. Its totient is φ = 290778956160.

The previous prime is 1200123321179. The next prime is 1200123321239. The reversal of 1200123321210 is 121233210021.

1200123321210 is a `hidden beast` number, since 1 + 200 + 1 + 233 + 21 + 210 = 666.

It is a super-2 number, since 2×1200123321210² (a number of 25 digits) contains 22 as substring.

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

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, 1472284 + ... + 2137256.

It is an arithmetic number, because the mean of its divisors is an integer number (35477692848).

Almost surely, 2^{1200123321210} is an apocalyptic number.

1200123321210 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 1200123321210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702929256704).

1200123321210 is an abundant number, since it is smaller than the sum of its proper divisors (2205735192198).

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

1200123321210 is a wasteful number, since it uses less digits than its factorization.

1200123321210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666820 (or 666817 counting only the distinct ones).

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

Adding to 1200123321210 its reverse (121233210021), we get a palindrome (1321356531231).

The spelling of 1200123321210 in words is "one trillion, two hundred billion, one hundred twenty-three million, three hundred twenty-one thousand, two hundred ten".