1201110021200 has 30 divisors (see below), whose sum is σ = 2885666826894. Its totient is φ = 480444008320.

The previous prime is 1201110021191. The next prime is 1201110021277. The reversal of 1201110021200 is 21200111021.

It can be written as a sum of positive squares in 3 ways, for example, as 68281870864 + 1132828150336 = 261308^2 + 1064344^2 .

It is a congruent number.

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, 1501387127 + ... + 1501387926.

Almost surely, 2^{1201110021200} is an apocalyptic number.

1201110021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201110021200 is an abundant number, since it is smaller than the sum of its proper divisors (1684556805694).

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

1201110021200 is a wasteful number, since it uses less digits than its factorization.

1201110021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002775071 (or 3002775060 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201110021200 its reverse (21200111021), we get a palindrome (1222310132221).

The spelling of 1201110021200 in words is "one trillion, two hundred one billion, one hundred ten million, twenty-one thousand, two hundred".