20112101200 has 30 divisors (see below), whose sum is σ = 48319324094. Its totient is φ = 8044840320.

The previous prime is 20112101123. The next prime is 20112101203. The reversal of 20112101200 is 210121102.

It can be written as a sum of positive squares in 3 ways, for example, as 1782190656 + 18329910544 = 42216^2 + 135388^2 .

It is a super-2 number, since 2×20112101200² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112101203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25139727 + ... + 25140526.

Almost surely, 2^20112101200 is an apocalyptic number.

20112101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112101200 is an abundant number, since it is smaller than the sum of its proper divisors (28207222894).

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

20112101200 is a wasteful number, since it uses less digits than its factorization.

20112101200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50280271 (or 50280260 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20112101200 its reverse (210121102), we get a palindrome (20322222302).

The spelling of 20112101200 in words is "twenty billion, one hundred twelve million, one hundred one thousand, two hundred".