20010101001200 has 120 divisors (see below), whose sum is σ = 49734774843600. Its totient is φ = 7727607982080.

The previous prime is 20010101001197. The next prime is 20010101001203. The reversal of 20010101001200 is 210010101002.

It is an interprime number because it is at equal distance from previous prime (20010101001197) and next prime (20010101001203).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010101001203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276426611 + ... + 276498989.

It is an arithmetic number, because the mean of its divisors is an integer number (414456457030).

Almost surely, 2^{20010101001200} is an apocalyptic number.

20010101001200 is a gapful number since it is divisible by the number (20) 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 20010101001200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24867387421800).

20010101001200 is an abundant number, since it is smaller than the sum of its proper divisors (29724673842400).

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

20010101001200 is a wasteful number, since it uses less digits than its factorization.

20010101001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96259 (or 96248 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20010101001200 its reverse (210010101002), we get a palindrome (20220111102202).

The spelling of 20010101001200 in words is "twenty trillion, ten billion, one hundred one million, one thousand, two hundred".