20010111021200 has 60 divisors (see below), whose sum is σ = 48074742048228. Its totient is φ = 8003969433600.

The previous prime is 20010111021163. The next prime is 20010111021209. The reversal of 20010111021200 is 212011101002.

It can be written as a sum of positive squares in 6 ways, for example, as 293278568704 + 19716832452496 = 541552^2 + 4440364^2 .

It is not an unprimeable number, because it can be changed into a prime (20010111021209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65653160 + ... + 65957240.

Almost surely, 2^{20010111021200} is an apocalyptic number.

20010111021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010111021200 is an abundant number, since it is smaller than the sum of its proper divisors (28064631027028).

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

20010111021200 is a wasteful number, since it uses less digits than its factorization.

20010111021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468612 (or 468601 counting only the distinct ones).

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

Adding to 20010111021200 its reverse (212011101002), we get a palindrome (20222122122202).

The spelling of 20010111021200 in words is "twenty trillion, ten billion, one hundred eleven million, twenty-one thousand, two hundred".