1201210100200 has 144 divisors (see below), whose sum is σ = 3070664363340. Its totient is φ = 436678809600.

The previous prime is 1201210100171. The next prime is 1201210100213. The reversal of 1201210100200 is 20010121021.

It can be written as a sum of positive squares in 6 ways, for example, as 707048903044 + 494161197156 = 840862^2 + 702966^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 151415434 + ... + 151423366.

Almost surely, 2^{1201210100200} is an apocalyptic number.

1201210100200 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 1201210100200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1535332181670).

1201210100200 is an abundant number, since it is smaller than the sum of its proper divisors (1869454263140).

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

1201210100200 is a wasteful number, since it uses less digits than its factorization.

1201210100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14228 (or 14208 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1201210100200 its reverse (20010121021), we get a palindrome (1221220221221).

The spelling of 1201210100200 in words is "one trillion, two hundred one billion, two hundred ten million, one hundred thousand, two hundred".