20111001101200 has 30 divisors (see below), whose sum is σ = 48316680146594. Its totient is φ = 8044400440320.

The previous prime is 20111001101131. The next prime is 20111001101203. The reversal of 20111001101200 is 210110011102.

It can be written as a sum of positive squares in 3 ways, for example, as 359980800256 + 19751020300944 = 599984^2 + 4444212^2 .

It is a super-2 number, since 2×20111001101200² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20111001101203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25138750977 + ... + 25138751776.

Almost surely, 2^{20111001101200} is an apocalyptic number.

20111001101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111001101200 is an abundant number, since it is smaller than the sum of its proper divisors (28205679045394).

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

20111001101200 is a wasteful number, since it uses less digits than its factorization.

20111001101200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50277502771 (or 50277502760 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20111001101200 its reverse (210110011102), we get a palindrome (20321111112302).

The spelling of 20111001101200 in words is "twenty trillion, one hundred eleven billion, one million, one hundred one thousand, two hundred".