20010101200 has 120 divisors (see below), whose sum is σ = 50233945536. Its totient is φ = 7645440000.

The previous prime is 20010101129. The next prime is 20010101201. The reversal of 20010101200 is 210101002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010101201) 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, 11048295 + ... + 11050105.

Almost surely, 2^20010101200 is an apocalyptic number.

20010101200 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 20010101200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25116972768).

20010101200 is an abundant number, since it is smaller than the sum of its proper divisors (30223844336).

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

20010101200 is a wasteful number, since it uses less digits than its factorization.

20010101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053 (or 3042 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20010101200 its reverse (210101002), we get a palindrome (20220202202).

The spelling of 20010101200 in words is "twenty billion, ten million, one hundred one thousand, two hundred".