1201210200100 has 18 divisors (see below), whose sum is σ = 2606626134434. Its totient is φ = 480484080000.

The previous prime is 1201210200077. The next prime is 1201210200181. The reversal of 1201210200100 is 10020121021.

It can be written as a sum of positive squares in 3 ways, for example, as 401641597504 + 799568602596 = 633752^2 + 894186^2 .

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 5 ways as a sum of consecutive naturals, for example, 6006050901 + ... + 6006051100.

Almost surely, 2^{1201210200100} is an apocalyptic number.

1201210200100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201210200100 is an abundant number, since it is smaller than the sum of its proper divisors (1405415934334).

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

1201210200100 is a wasteful number, since it uses less digits than its factorization.

1201210200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12012102015 (or 12012102008 counting only the distinct ones).

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

Adding to 1201210200100 its reverse (10020121021), we get a palindrome (1211230321121).

The spelling of 1201210200100 in words is "one trillion, two hundred one billion, two hundred ten million, two hundred thousand, one hundred".